Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected
Videos
-
Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected
01:27 | April 25, 2020
-
Health Matters: Pen appears empty after B.C. ostriches culled
02:33 | 3 hours ago
-
What could new health spending budget mean for Canadians?
01:26 | November 6, 2025
-
Health Matters: Microplastics found in lobster tails off N.S. coast
02:37 | November 6, 2025
-
Dispelling skin care myths: Are wrinkles really preventable?
04:15 | November 5, 2025
-
Hayley Wickenheiser has a new way to combat diabetes
04:58 | November 5, 2025
-
Health Matters: Carney introduces new health spending in 2025 budget
02:23 | November 5, 2025
-
A good night’s sleep: Choosing the right mattress and pillow
05:48 | November 4, 2025
-
Health Matters: Painkiller shortage expected to continue in Canada
02:14 | November 4, 2025
-
CMA urging Ottawa to maintain health-care funding in upcoming budget
01:28 | November 3, 2025
-
Sleeping coach on the secret to getting a better night’s sleep
06:04 | November 3, 2025
-
Health Matters: 42M Americans unsure about food-aid benefits amid shutdown
02:30 | November 3, 2025
-
Doctors urge seniors to get RSV vaccine ahead of respiratory virus season
02:10 | November 2, 2025
-
Daylight saving time: Is the clock change messing with your ability to work?
01:45 | November 1, 2025
-
Health Matters: Blood pressure medicine recalled over concerns of cancer-causing chemical
02:25 | October 31, 2025
-
The most common Halloween injuries and what to look out for
01:47 | October 31, 2025
-
Quebec government, doctors fighting over pay structure changes
02:00 | October 30, 2025
-
Health Matters: Illegal market for vapes continues to explode in QC, Imperial Tobacco Canada says
02:29 | October 30, 2025
-
Stress strategies for getting a good night’s sleep
05:30 | October 30, 2025
-
Ontario’s Ford wooing doctors from Quebec after it passes controversial Bill 2
02:08 | October 29, 2025
-
Ford tells Quebec doctors to call him as some look to leave over compensation dispute
01:33 | October 29, 2025
-
Health Canada approves early Alzheimer’s drug
02:02 | October 28, 2025
-
Health Matters: Rising measles cases being fueled in part by vaccine hesitancy around the world, study shows
02:34 | October 28, 2025
-
Canada could soon lose status as measles-free country, Public Health Ontario says
01:56 | October 27, 2025
-
Health Matters: Doctors concerned about students using prescription painkillers for non-medical reasons
02:42 | October 27, 2025
-
Clinical trial results show electronic eye implant is helping restore sight in some patients
02:21 | October 26, 2025
-
Obstetrics crisis in Kamloops amplifies Canada-wide issue with doctor burnout
02:15 | October 25, 2025
-
How to prepare your skin for the cold as winter looms
04:37 | October 24, 2025
-
Health Matters: Blue Jays pride can help improve mental health, research shows
02:32 | October 24, 2025
-
Canadian mental health needs going unmet, CIHI report
01:38 | October 23, 2025
-
Health Matters: COVID-19 vaccine may help cancer treatments, study finds
02:17 | October 23, 2025
-
Health Matters: 117 people ill amid pistachio salmonella outbreak, PHAC says
02:21 | October 22, 2025
-
Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected
01:27 | April 25, 2020
-
Health Matters: Pen appears empty after B.C. ostriches culled
02:33 | 3 hours ago
-
What could new health spending budget mean for Canadians?
01:26 | November 6, 2025
-
Health Matters: Microplastics found in lobster tails off N.S. coast
02:37 | November 6, 2025
-
Dispelling skin care myths: Are wrinkles really preventable?
04:15 | November 5, 2025
-
Hayley Wickenheiser has a new way to combat diabetes
04:58 | November 5, 2025
-
Health Matters: Carney introduces new health spending in 2025 budget
02:23 | November 5, 2025
-
A good night’s sleep: Choosing the right mattress and pillow
05:48 | November 4, 2025
-
Health Matters: Painkiller shortage expected to continue in Canada
02:14 | November 4, 2025
-
CMA urging Ottawa to maintain health-care funding in upcoming budget
01:28 | November 3, 2025
-
Sleeping coach on the secret to getting a better night’s sleep
06:04 | November 3, 2025
-
Health Matters: 42M Americans unsure about food-aid benefits amid shutdown
02:30 | November 3, 2025
-
Doctors urge seniors to get RSV vaccine ahead of respiratory virus season
02:10 | November 2, 2025
-
Daylight saving time: Is the clock change messing with your ability to work?
01:45 | November 1, 2025
-
Health Matters: Blood pressure medicine recalled over concerns of cancer-causing chemical
02:25 | October 31, 2025
-
The most common Halloween injuries and what to look out for
01:47 | October 31, 2025
-
Quebec government, doctors fighting over pay structure changes
02:00 | October 30, 2025
-
Health Matters: Illegal market for vapes continues to explode in QC, Imperial Tobacco Canada says
02:29 | October 30, 2025
-
Stress strategies for getting a good night’s sleep
05:30 | October 30, 2025
-
Ontario’s Ford wooing doctors from Quebec after it passes controversial Bill 2
02:08 | October 29, 2025
-
Ford tells Quebec doctors to call him as some look to leave over compensation dispute
01:33 | October 29, 2025
-
Health Canada approves early Alzheimer’s drug
02:02 | October 28, 2025
-
Health Matters: Rising measles cases being fueled in part by vaccine hesitancy around the world, study shows
02:34 | October 28, 2025
-
Canada could soon lose status as measles-free country, Public Health Ontario says
01:56 | October 27, 2025
-
Health Matters: Doctors concerned about students using prescription painkillers for non-medical reasons
02:42 | October 27, 2025
-
Clinical trial results show electronic eye implant is helping restore sight in some patients
02:21 | October 26, 2025
-
Obstetrics crisis in Kamloops amplifies Canada-wide issue with doctor burnout
02:15 | October 25, 2025
-
How to prepare your skin for the cold as winter looms
04:37 | October 24, 2025
-
Health Matters: Blue Jays pride can help improve mental health, research shows
02:32 | October 24, 2025
-
Canadian mental health needs going unmet, CIHI report
01:38 | October 23, 2025
-
Health Matters: COVID-19 vaccine may help cancer treatments, study finds
02:17 | October 23, 2025
-
Health Matters: 117 people ill amid pistachio salmonella outbreak, PHAC says
02:21 | October 22, 2025
Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected
Description
April 25, 2020
The World Health Organization (WHO) said on Saturday that there's currently “no evidence” that people who have recovered from COVID-19, and have antibodies as a result of infection, are protected from a second coronavirus infection. The agency warned governments against issuing "immunity passports" or "risk free certificates" to people who have been infected, as their immunity is not guaranteed. Chile officials said last week it would begin handing out "health passports" to people who had developed antibodies to the virus so they could immediately rejoin the workforce.
-
Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected01:27 | April 25, 2020 -
Health Matters: Pen appears empty after B.C. ostriches culled02:33 | 3 hours ago -
What could new health spending budget mean for Canadians?01:26 | November 6, 2025 -
Health Matters: Microplastics found in lobster tails off N.S. coast02:37 | November 6, 2025 -
Dispelling skin care myths: Are wrinkles really preventable?04:15 | November 5, 2025 -
Hayley Wickenheiser has a new way to combat diabetes04:58 | November 5, 2025 -
Health Matters: Carney introduces new health spending in 2025 budget02:23 | November 5, 2025 -
A good night’s sleep: Choosing the right mattress and pillow05:48 | November 4, 2025 -
Health Matters: Painkiller shortage expected to continue in Canada02:14 | November 4, 2025 -
CMA urging Ottawa to maintain health-care funding in upcoming budget01:28 | November 3, 2025 -
Sleeping coach on the secret to getting a better night’s sleep06:04 | November 3, 2025 -
Health Matters: 42M Americans unsure about food-aid benefits amid shutdown02:30 | November 3, 2025 -
Doctors urge seniors to get RSV vaccine ahead of respiratory virus season02:10 | November 2, 2025 -
Daylight saving time: Is the clock change messing with your ability to work?01:45 | November 1, 2025 -
Health Matters: Blood pressure medicine recalled over concerns of cancer-causing chemical02:25 | October 31, 2025 -
The most common Halloween injuries and what to look out for01:47 | October 31, 2025 -
Quebec government, doctors fighting over pay structure changes02:00 | October 30, 2025 -
Health Matters: Illegal market for vapes continues to explode in QC, Imperial Tobacco Canada says02:29 | October 30, 2025 -
Stress strategies for getting a good night’s sleep05:30 | October 30, 2025 -
Ontario’s Ford wooing doctors from Quebec after it passes controversial Bill 202:08 | October 29, 2025 -
Ford tells Quebec doctors to call him as some look to leave over compensation dispute01:33 | October 29, 2025 -
Health Canada approves early Alzheimer’s drug02:02 | October 28, 2025 -
Health Matters: Rising measles cases being fueled in part by vaccine hesitancy around the world, study shows02:34 | October 28, 2025 -
Canada could soon lose status as measles-free country, Public Health Ontario says01:56 | October 27, 2025 -
Health Matters: Doctors concerned about students using prescription painkillers for non-medical reasons02:42 | October 27, 2025 -
Clinical trial results show electronic eye implant is helping restore sight in some patients02:21 | October 26, 2025 -
Obstetrics crisis in Kamloops amplifies Canada-wide issue with doctor burnout02:15 | October 25, 2025 -
How to prepare your skin for the cold as winter looms04:37 | October 24, 2025 -
Health Matters: Blue Jays pride can help improve mental health, research shows02:32 | October 24, 2025 -
Canadian mental health needs going unmet, CIHI report01:38 | October 23, 2025 -
Health Matters: COVID-19 vaccine may help cancer treatments, study finds02:17 | October 23, 2025 -
Health Matters: 117 people ill amid pistachio salmonella outbreak, PHAC says02:21 | October 22, 2025
-
Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected01:27 | April 25, 2020
-
Health Matters: Pen appears empty after B.C. ostriches culled02:33 | 3 hours ago
-
What could new health spending budget mean for Canadians?01:26 | November 6, 2025
-
Health Matters: Microplastics found in lobster tails off N.S. coast02:37 | November 6, 2025
-
Dispelling skin care myths: Are wrinkles really preventable?04:15 | November 5, 2025
-
Hayley Wickenheiser has a new way to combat diabetes04:58 | November 5, 2025
-
Health Matters: Carney introduces new health spending in 2025 budget02:23 | November 5, 2025
-
A good night’s sleep: Choosing the right mattress and pillow05:48 | November 4, 2025
-
Health Matters: Painkiller shortage expected to continue in Canada02:14 | November 4, 2025
-
CMA urging Ottawa to maintain health-care funding in upcoming budget01:28 | November 3, 2025
-
Sleeping coach on the secret to getting a better night’s sleep06:04 | November 3, 2025
-
Health Matters: 42M Americans unsure about food-aid benefits amid shutdown02:30 | November 3, 2025
-
Doctors urge seniors to get RSV vaccine ahead of respiratory virus season02:10 | November 2, 2025
-
Daylight saving time: Is the clock change messing with your ability to work?01:45 | November 1, 2025
-
Health Matters: Blood pressure medicine recalled over concerns of cancer-causing chemical02:25 | October 31, 2025
-
The most common Halloween injuries and what to look out for01:47 | October 31, 2025
-
Quebec government, doctors fighting over pay structure changes02:00 | October 30, 2025
-
Health Matters: Illegal market for vapes continues to explode in QC, Imperial Tobacco Canada says02:29 | October 30, 2025
-
Stress strategies for getting a good night’s sleep05:30 | October 30, 2025
-
Ontario’s Ford wooing doctors from Quebec after it passes controversial Bill 202:08 | October 29, 2025
-
Ford tells Quebec doctors to call him as some look to leave over compensation dispute01:33 | October 29, 2025
-
Health Canada approves early Alzheimer’s drug02:02 | October 28, 2025
-
Health Matters: Rising measles cases being fueled in part by vaccine hesitancy around the world, study shows02:34 | October 28, 2025
-
Canada could soon lose status as measles-free country, Public Health Ontario says01:56 | October 27, 2025
-
Health Matters: Doctors concerned about students using prescription painkillers for non-medical reasons02:42 | October 27, 2025
-
Clinical trial results show electronic eye implant is helping restore sight in some patients02:21 | October 26, 2025
-
Obstetrics crisis in Kamloops amplifies Canada-wide issue with doctor burnout02:15 | October 25, 2025
-
How to prepare your skin for the cold as winter looms04:37 | October 24, 2025
-
Health Matters: Blue Jays pride can help improve mental health, research shows02:32 | October 24, 2025
-
Canadian mental health needs going unmet, CIHI report01:38 | October 23, 2025
-
Health Matters: COVID-19 vaccine may help cancer treatments, study finds02:17 | October 23, 2025
-
Health Matters: 117 people ill amid pistachio salmonella outbreak, PHAC says02:21 | October 22, 2025
Coronavirus outbreak: WHO warns ‘no evidence’ that COVID-19 patients cannot be reinfected
Description
April 25, 2020
The World Health Organization (WHO) said on Saturday that there's currently “no evidence” that people who have recovered from COVID-19, and have antibodies as a result of infection, are protected from a second coronavirus infection. The agency warned governments against issuing "immunity passports" or "risk free certificates" to people who have been infected, as their immunity is not guaranteed. Chile officials said last week it would begin handing out "health passports" to people who had developed antibodies to the virus so they could immediately rejoin the workforce.
National News
-
2026 Grammy Awards: Osbourne family pay tribute to Ozzy, announce rock and metal nominees0:576 hours ago -
2026 Grammy Awards nominations: Kendrick Lamar leads list of music contenders1:426 hours ago -
Is there a coup underway against Pierre Poilievre in the Conservative Party?8:177 hours ago -
KO punch: Sydney Sweeney swings hard at transformative role in boxing biopic ‘Christy’5:075 hours ago -
Prince Harry says he wore LA Dodgers cap at World Series to hide bald spot2:518 hours ago -
Millie Bobby Brown, David Harbour all smiles at “Stranger Things” premiere despite harassment allegations2:385 hours ago -
Olivia Chow must take responsibility for attack on Jewish students at Toronto university9:487 hours ago -
Health Matters: Pen appears empty after B.C. ostriches culled2:337 hours ago -
Business Matters: Canada’s unemployment rate tumbles in October for 1st time in 3 months2:355 hours ago -
A look back at Bailey Zimmerman: mom’s kitchen to tour with Morgan Wallen2:1710 hours ago
Advertisement
Top News
-
2026 Grammy Awards: Osbourne family pay tribute to Ozzy, announce rock and metal nominees0:576 hours ago -
2026 Grammy Awards nominations: Kendrick Lamar leads list of music contenders1:426 hours ago -
Millie Bobby Brown, David Harbour all smiles at “Stranger Things” premiere despite harassment allegations2:385 hours ago -
Ostrich cull at Edgewood farm complete1:065 hours ago -
Louvre slammed for spending money on art instead of security in years before heist2:0122 hours ago -
‘Trump is against humanity’: Colombia, Chile blast U.S. president for not attending COP302:2423 hours ago -
‘It should never happen’: Mexican president files complaint after man groped her in public2:132 days ago -
Democrats sweep 1st major elections of Trump’s second term3:372 days ago -
At least 7 dead in UPS cargo plane crash1:362 days ago -
Canada budget 2025: Carney looking to cut civil service, boost capital spending2:473 days ago
Sponsored Content
Trending
-
Ostrich cull at Edgewood farm complete1:065 hours ago -
Woman alleges she was drugged at Korn concert in Edmonton2:0222 hours ago -
Tanker leaking bitumen into North Saskatchewan River after crash0:295 hours ago -
Travellers brace for airport disruptions caused by U.S. government shutdown2:1322 hours ago -
Trump says SCOTUS ruling against tariffs would be ‘devastating’0:431 day ago -
Health Matters: Pen appears empty after B.C. ostriches culled2:337 hours ago -
Wiretap evidence sheds light on Nijjar murder2:2622 hours ago
Canada
-
Body of woman discovered in wreckage already towed from scene of fatal Ontario crash2:105 hours ago -
‘I’m truly sorry’: Prince Harry apologizes to Toronto for wearing Dodgers hat, blames bald spot1:468 hours ago -
‘Worst mistake in Canadian history’: Outrage after Canada’s top court rejects B.C. ostrich cull appeal bid2:1122 hours ago -
Conservative MP Matt Jeneroux resigns, 2nd to leave caucus this week1:3922 hours ago -
Alberta Teachers’ Association taking province to court over forced end of strike1:4523 hours ago -
Halifax artist Jah’Mila rallies support for hurricane relief in Jamaica6:031 day ago -
Floor-crosser hints more Conservative MPs could defect to Liberals2:082 days ago -
Another Quebec politician leaves Legault’s CAQ party over doctor legislation, Bill 22:272 days ago
-
Carney promises to table legislation that will ‘penalize’ possession of child abuse materials4:132 days ago -
Carney calls floor-crossing ex-Conservative MP ‘exceptionally valuable’2:292 days ago
U.S. News
-
Airlines cancel flights at some of the biggest U.S. airports in response to shutdown1:426 hours ago -
‘I’m truly sorry’: Prince Harry apologizes to Toronto for wearing Dodgers hat, blames bald spot1:468 hours ago -
Travellers brace for airport disruptions caused by U.S. government shutdown2:1322 hours ago -
Pelosi announces retirement from U.S. Congress0:2623 hours ago -
Trump announces deal to reduce prices of weight-loss drugs0:471 day ago -
Business Matters: Majority of Americans think Canada is negotiating in good faith2:421 day ago -
Democrats dominate state, local U.S. elections2:152 days ago -
NYC Mayor-elect Zohran Mamdani’s message to Trump3:082 days ago -
Ex-U.S. vice-president Dick Cheney dies at 842:183 days ago -
2 men arrested in connection with explosion at Harvard Medical School2:333 days ago
Advertisement
World
-
Several African nations facing geopolitical challenges7:145 hours ago -
Louvre slammed for spending money on art instead of security in years before heist2:0122 hours ago -
Supreme Court of Canada dismisses farm’s appeal to save ostrich flock1:531 day ago -
Paris gives residents chance to be buried in famed cemeteries1:472 days ago -
Outrage in Paris as fast-fashion company Shein opens 1st brick-and-mortar store3:042 days ago -
Family holds funeral for returned Israeli soldier2:033 days ago -
Russia-Ukraine war: Police evacuate civilians from eastern frontline under Russian siege2:293 days ago -
Typhoon Kalmaegi kills at least 40 in Philippines, brings heavy flooding and destructive winds1:133 days ago -
Survivors who fled Sudan’s El Fasher recount alleged atrocities1:574 days ago -
UK train stabbing: ‘Hero’ employee in critical condition, commended for saving lives3:064 days ago
Politics
-
Alberta Premier Smith says provinces ‘have the right’ to send labour unions back to work3:535 hours ago -
Canada’s economic strategy to “dramatically” change after rupture with US trade ties: Carney2:586 hours ago -
Airlines cancel flights at some of the biggest U.S. airports in response to shutdown1:426 hours ago -
B.C. Jobs Minister Ravi Kahlon reacts to October jobs numbers4:317 hours ago -
Business Matters: Canada’s unemployment rate tumbles in October for 1st time in 3 months2:355 hours ago -
Ontario’s landfill crisis: The cost of inaction2:535 hours ago -
Temporary warming shelter for women set to open this weekend4:3612 hours ago -
Louvre slammed for spending money on art instead of security in years before heist2:0122 hours ago -
Travellers brace for airport disruptions caused by U.S. government shutdown2:1322 hours ago -
Wiretap evidence sheds light on Nijjar murder2:2622 hours ago
Health and Wellness
-
2025 Federal Budget: What $5 billion means for Canada’s health system6:005 hours ago -
Health Matters: The month of the moustache5:181 day ago -
How CASA Mental Health is meeting TRC Calls to Action4:491 day ago -
Health Matters: Microplastics found in lobster tails off N.S. coast2:371 day ago -
Saskatoon part of giant cell arteritis clinical trial4:391 day ago -
B.C. study looks at teen vaping1:472 days ago -
Dispelling skin care myths: Are wrinkles really preventable?4:152 days ago -
Hayley Wickenheiser has a new way to combat diabetes4:582 days ago -
Health Matters: Carney introduces new health spending in 2025 budget2:232 days ago -
B.C. researchers using AI for cardiac care1:553 days ago
Advertisement
Investigative News
-
Ontario’s landfill crisis: The cost of inaction2:535 hours ago -
Canada fails to deport Iranian regime member2:021 month ago -
Police defend handling of information on arrest overseas of wanted B.C. fugitive2:381 month ago -
‘ChatGPT was helping’: Kenyan human trafficking survivor reveals AI role in Myanmar scam centres2:522 months ago -
Alberta man was ISIS propagandist, police say2:182 months ago -
Court docs reveal CSIS told RCMP about alleged Quebec militia members2:063 months ago -
B.C. woman wrongly declared ‘deceased’ by federal Vaccine Injury Support Program3:003 months ago -
‘Slap in the face’: Calls for investigation into Vaccine Injury Support Program2:414 months ago -
Quebec terrorism suspects didn’t get guns and ammo from us: Canadian Forces1:414 months ago -
Federal Vaccine Injury Support Program leaving some injured people waiting for years3:024 months ago
News Bloopers
-
‘Can’t use that on TV’: Ĵý a Ĵý reporter jump from the highest bungee jump in Canada0:376 months ago -
Black bear in tree has rough landing after being tranquilized at Halifax-area park0:4914 months ago -
Edmonton, B.C. morning show hosts settle NHL playoff bet3:0518 months ago -
‘You can’t make this stuff up:’ Loud clap of thunder interrupts live TV segment at pivotal moment0:2525 months ago -
Global Calgary weather anchor startled by surprise guest appearance0:2129 months ago -
Fun times? Ĵý personalities help clear snow in search of ‘fun’ story2:0036 months ago -
‘Buzzworthy moment’: Colin D’Mello recaps Doug Ford accidentally swallowing a bee1:5739 months ago -
‘Did you just call me daddy?’: Morning show hosts can’t hold back laughter after on-air mixup1:1539 months ago -
B.C. dad hoping to see his cloud photo on TV get his wish following viral TikTok campaign2:1243 months ago -
Bloopers: Phil Darlington slips, slides and falls in these Our Winter City outtakes1:3837 months ago