Indian envoy warns of 'big red line,' days after charges laid in Nijjar case
India's envoy to Canada insists relations between the two countries are positive overall, despite what he describes as 'a lot of noise.'
U.S. health authorities are facing a critical decision: whether to offer new COVID-19 booster shots this fall that are modified to better match recent changes of the shape-shifting coronavirus.
Moderna and Pfizer have tested updated shots against the super-contagious Omicron variant, and advisers to the Food and Drug Administration will debate Tuesday if it’s time to make a switch — setting the stage for similar moves by other countries.
“This is science at its toughest,” FDA vaccine chief Dr. Peter Marks told The Associated Press, adding that a final decision is expected within days of the advisory panel's recommendation.
Current COVID-19 vaccines saved millions of lives around the world in just their first year of use. And the Moderna and Pfizer shots still offer strong protection against the worst outcomes -- severe illness and death — especially after a booster dose.
But those vaccines target the original coronavirus strain and between waning immunity and a relentless barrage of variants, protection against infections has dropped markedly. The challenge is deciding if tweaked boosters offer a good chance of blunting another surge when there's no way to predict which mutant will be the main threat.
In an analysis prepared for Tuesday's meeting, FDA officials acknowledged targeting last winter's version of Omicron is “somewhat outdated" since it already has been replaced by its even more contagious relatives.
“We would obviously like to get it right enough," Marks said, so that with one more shot “we get a full season of protection.”
Many experts say updated boosters promise at least a little more benefit.
“It is more likely to be helpful” than simply giving additional doses of today’s vaccine, said epidemiologist William Hanage of the Harvard T.H. Chan School of Public Health.
That’s assuming the virus doesn’t throw another curve ball.
“We’re following rather than getting ahead which is so vexing -- that we haven’t come up with a better variant-proof vaccine,” said Dr. Eric Topol, head of the Scripps Research Translational Institute, who has urged a major government push for next-generation immunizations.
Adding to concern about a winter COVID-19 wave is that about half of Americans eligible for that all-important first booster dose never got it. An updated version might entice some of them.
But “we do need to change our expectations,” said Dr. William Moss of the Johns Hopkins Bloomberg School of Public Health, who noted that studies early in the pandemic raised unrealistic hopes of blocking even the mildest infections. “Our strategy can’t be booster doses every couple of months, even every six months, to prevent infections.”
The top candidates are what scientists call “bivalent” shots — a combination of the original vaccine plus Omicron protection.
That’s because the original vaccines do spur production of at least some virus-fighting antibodies strong enough to cross-react with newer mutants -- in addition to their proven benefits against severe disease, said University of Pennsylvania immunologist E. John Wherry.
“Being able to push the boost response a little bit in one direction or the other without losing the core is really important,” he said.
Moderna and Pfizer found their combo shots substantially boosted levels of Omicron-fighting antibodies in adults who'd already had three vaccinations, more than simply giving another regular dose.
Recipients also developed antibodies that could fight Omicron’s newest relatives named BA.4 and BA.5, although not nearly as many. It's not clear how much protection that will translate into, and for how long.
Antibodies are a key first layer of defense that form after vaccination or a prior infection. They can prevent infection by recognizing the outer coating of the coronavirus -- the spike protein -- and blocking it from entering your cells.
But antibodies naturally wane and each new variant comes with a different-looking spike protein, giving it a better chance of evading detection by remaining antibodies. Separate studies published this month in Nature and the New England Journal of Medicine show the newest Omicron relatives are even better at dodging antibodies — both in the vaccinated and in people who recovered from the original Omicron.
That first booster people were supposed to get strengthened immune memory, helping explain why protection against hospitalization and death is proving more durable. If the virus sneaks past antibodies, different defenders called T cells spring into action, attacking infected cells to curb illness.
“T cells recognize the virus in a fundamentally different way,” not hunting for disguised spike protein but for parts of the virus that so far haven't been altered as much, said Penn’s Wherry.
Still, as people get older, all parts of their immune system gradually weaken. There’s little data on how long T cell protection against COVID-19 lasts or how it varies with different mutations or vaccines.
Wherry and dozens of other scientists recently petitioned the FDA to quit focusing solely on antibodies and start measuring T cells as it decides vaccination strategy.
The Biden administration has made clear that it needs Congress to provide more money so that if the FDA clears updated boosters, the government can buy enough for every American who wants one. And Dr. Anthony Fauci, the government's top infectious disease expert, told Congress last week more research funding also is critical to create better next-generation vaccines, such as nasal versions that might better block infection in the nose or more variant-proof shots.
“The virus is changing and we need to keep up with it,” Fauci, said.
___
The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.
India's envoy to Canada insists relations between the two countries are positive overall, despite what he describes as 'a lot of noise.'
With Donald Trump sitting just feet away, Stormy Daniels testified Tuesday at the former president's hush money trial about a sexual encounter the porn actor says they had in 2006 that resulted in her being paid to keep silent during the presidential race 10 years later.
The U.S. paused a shipment of bombs to Israel last week over concerns that Israel was approaching a decision on launching a full-scale assault on the southern Gaza city of Rafah against the wishes of the U.S.
Footage from dozens of security cameras in the area of Drake’s Bridle Path mansion could be the key to identifying the suspect responsible for shooting and seriously injuring a security guard outside the rapper’s sprawling home early Tuesday morning, a former Toronto homicide detective says.
A chicken farmer near Mattawa made an 'eggstraordinary' find Friday morning when she discovered one of her hens laid an egg close to three times the size of an average large chicken egg.
Susan Buckner, best known for playing peppy Rydell High School cheerleader Patty Simcox in the 1978 classic movie musical 'Grease,' has died. She was 72.
Accused killer Jeremy Skibicki could have a challenging time convincing a judge that he is not criminally responsible for the deaths of four Indigenous women, a legal analyst says.
A Calgary bylaw requiring businesses to charge a minimum bag fee and only provide single-use items when requested has officially been tossed.
Two Nova Scotia men are dead after a boat they were travelling in sank in the Annapolis River in Granville Centre, N.S., on Monday.
An Ontario man says he paid more than $7,700 for a luxury villa he found on a popular travel website -- but the listing was fake.
Whether passionate about Poirot or hungry for Holmes, Winnipeg mystery obsessives have had a local haunt for over 30 years in which to search out their latest page-turners.
Eighty-two-year-old Susan Neufeldt and 90-year-old Ulrich Richter are no spring chickens, but their love blossomed over the weekend with their wedding at Pine View Manor just outside of Rosthern.
Alberta Ballet's double-bill production of 'Der Wolf' and 'The Rite of Spring' marks not only its final show of the season, but the last production for twin sisters Alexandra and Jennifer Gibson.
A mother goose and her goslings caused a bit of a traffic jam on a busy stretch of the Trans-Canada Highway near Vancouver Saturday.
A British Columbia mayor has been censured by city council – stripping him of his travel and lobbying budgets and removing him from city committees – for allegedly distributing a book that questions the history of Indigenous residential schools in Canada.
Three men in Quebec from the same family have fathered more than 600 children.
A group of SaskPower workers recently received special recognition at the legislature – for their efforts in repairing one of Saskatchewan's largest power plants after it was knocked offline for months following a serious flood last summer.
A police officer on Montreal's South Shore anonymously donated a kidney that wound up drastically changing the life of a schoolteacher living on dialysis.