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Moderna took a nearly $500 million hit on write-downs for vaccine inventory that has expired or is expected to expire before is can be used.

The stocks making the biggest moves in premarket trading include CVS, Under Armour, Moderna and more.

Many scientists believe that updating the vaccines to target omicron BA.4 and BA.5 will provide more durable protection against infection this fall.

With new COVID-19 boosters expected later this year, health experts urge Californians not to put off a first or second booster shot until then.

Canadian regulators have authorized Moderna’s COVID-19 shots for infants and preschoolers

Vaccinating children under 5 is crucially important in the country's fight against Covid, experts say. Just don't expect the virus to disappear overnight.

A court ruling is back in effect that blocks President Joe Biden from requiring federal employees to get vaccinated against COVID-19.

The U.S. Food and Drug Administration is considering ordering a recipe change for the vaccines made by both Pfizer and rival Moderna in hopes that modified boosters could better protect against another surge.

Pfizer's Omicron-only booster sparked the strongest immune response against that variant.

Pfizer said that tweaking its vaccine to better target the omicron variant is safe and works — just days before regulators debate whether to offer Americans updated booster shots this fall.

Pfizer says tweaking its COVID-19 vaccine to better target the omicron variant is safe and boosts protection.

From timing and side effects to choosing between Pfizer and Moderna, here's a primer for parents trying to untangle Covid vaccinations for children under age 5.

Both Pfizer and Moderna are considered safe for kids of all ages, but here are a couple of differences that parents can consider.

The White House COVID-19 response team is urging parents to get their young children vaccinated as the country begins to rollout vaccines to the youngest population.

Moderna's request had been stalled for months as regulators studied whether it posed a higher risk of rare heart inflammation side effects.

CDC Director Dr. Rochelle Walensky is expected to sign off on the recommendation later Thursday,.

Georgia's Supreme Court has overturned the murder and child cruelty convictions against a man whose son died after he left him in a hot car for hours. The justices ruled the jury saw evidence that was “extremely and unfairly prejudicial.”

NPR talks to Claire Hannan, who has helped navigate vaccine rollouts in all 50 states, about some of the challenges involved in quickly getting shots out to millions of young kids.

On Monday, some Illinois providers began giving the first COVID-19 vaccines to children under the age of 5.

Will you be vaccinating your child?

The nation’s youngest children are getting their chance at vaccines for COVID-19.

Chicago children under the age of 5 began receiving pediatric COVID-19 vaccines on June 20, 2022.

This expands coronavirus vaccine offerings to children as young as 6 months.

Roughly 18 million kids will be eligible, but it remains to be seen how many will ultimately get the vaccines.

The final signoff is expected later in the day from CDC Director Dr. Rochelle Walensky.

U.S. health officials have opened COVID-19 vaccines for infants, toddlers and preschoolers — the last group without the shots.

The vaccinations for children as young as 6 months old could start next week. But first, the Centers for Disease Control and Prevention must sign off.

The FDA's action allows the companies to begin shipping millions of preordered doses across the country.

The FDA's action allows the companies to begin shipping millions of preordered doses across the country.

U.S. regulators on Friday authorized the first COVID-19 shots for infants and preschoolers, paving the way for vaccinations to begin next week.

The White House expects vaccinations to begin as soon as Tuesday.

U.S. regulators have authorized the first COVID-19 shots for infants and preschoolers.

Before shots can be administered to kids as young as 6 months old, the CDC's vaccine advisers are scheduled to vote on updated recommendations this Saturday.

The Centers for Disease Control and Prevention considers whether to approve vaccines for children younger than 5 this week

FDA reviewers said both brands, Moderna and Pfizer, appear to be safe and effective for children as young as 6 months old.

COVID-19 shots for infants, toddlers and preschoolers in the U.S. have moved a step closer.

The FDA's panel of vaccine advisers voted unanimously that the benefits of Pfizer's and Moderna's shots outweigh the risks in young children.

The FDA will likely accept the recommendation and authorize the shots this week.

Vaccine effectiveness was estimated at 93% for the teens, and 77% for the younger children, according to the FDA analysis.

Vaccine effectiveness was estimated at 93% for the teens, and 77% for the younger children, according to the FDA analysis.

A government advisory panel has endorsed a second brand of COVID-19 vaccine for school-age children and teens.

Moderna's two-dose Covid-19 vaccine for kids ages 6 through 17 received the endorsement from the Food and Drug Administration's committee of independent immunization experts on Tuesday, a key step on the path to distributing it to kids. The shots for kids ages 6 to 11 had estimated an estimated effectiveness of 76% effective at preventing illness from the delta variant. About 30% of kids ages 5 to 11 and 60% of teens 12 to 17 are fully vaccinated as of early June. Authorizing of Moderna's vaccine for kids ages 6 to 17 would bring eligibility in line with Pfizer's shots. The FDA committee will meet on Wednesday to discuss the vaccine for infants through preschoolers, the only age group left not eligible for vaccination.

A government advisory panel has endorsed a second brand of COVID-19 vaccine for school-age children and teens.

The review from the Food and Drug Administration is a key step toward an expected decision to begin vaccinating babies, toddlers and preschoolers.

Next week brings a marathon of hearings as the U.S. decides whether to open COVID-19 vaccinations to kids under 5.

White House officials say pharmacies and states have ordered 1.45 million Pfizer doses and about 850,000 Moderna shots.

Now that an FDA advisory committee has recommended the Novavax COVID-19 vaccination for emergency use, experts say we could possibly see the FDA give full approval of the vaccine soon.

The FDA's vaccine advisers meet later this month to weigh updating booster shots.

COVID-19 vaccine makers are studying updated boosters that might be offered in the fall to better protect people against future coronavirus surges.

The "bivalent" vaccine — meaning it targets two different antigens — is Moderna's leading candidate to have an effective booster ready for fall of 2022, the company said.

These are the stocks posting the largest moves before the bell.

Moderna says its experimental COVID-19 vaccine that combines its original shot with protection against the omicron variant appears to work.

Parents hoping to get their youngest children vaccinated against COVID-19 have some encouraging news.

Pfizer says preliminary data shows its three-dose vaccine regimen is 80% effective in preventing symptomatic COVID-19 in kids 6 months to 4 years old.

Pfizer says preliminary data shows its three-dose vaccine regimen is 80% effective in preventing symptomatic COVID-19 in kids 6 months to 4 years old.

The U.S. will have to decide soon whether to bet big on an Omicron vaccine.

The license would help the World Health Organization work with manufacturers around the world to produce their own Covid-19 vaccines.

Novavax reported net income of $203 million in the first quarter, compared to a net loss of $222.7 million the same period last year.

The FDA said the shot should only be given to adults who cannot receive a different vaccine or specifically request J&J's vaccine.

The Food and Drug Administration said the shot should only be given to adults who cannot receive a different vaccine or specifically request J&J's vaccine.

U.S. regulators are strictly limiting who can receive Johnson & Johnson’s COVID-19 vaccine due to a rare but serious risk of blood clots.

These are the stocks posting the largest moves before the bell.

Pfizer now hopes to tell U.S. regulators how well its COVID-19 vaccine works in the littlest kids by early June.

The biotech Arcturus has shown how new self-copying mRNA technology could get many people vaccinated quickly.

The Food and Drug Administration has set tentative dates in June to publicly review COVID-19 vaccines for the youngest American children.

Moderna is asking U.S. regulators to open its COVID-19 vaccine to the nation's youngest children.

Moderna is asking U.S. regulators to open its COVID-19 vaccine to the nation's youngest children.

Many Americans can now get a second COVID-19 booster, but it’s hard to tell who really needs another shot right now and who could wait.

The Food and Drug Administration on Tuesday authorized another COVID-19 booster for people age 50 and older.

Americans age 50 and older can get a second COVID-19 booster if it’s been at least four months since their last vaccination.

Moderna says it will ask regulators to authorize its COVID-19 vaccine for children under 6 but several hurdles need to be cleared before the shots could become available.

Moderna says its COVID-19 vaccine works in babies, toddlers and preschoolers.

Drugmaker Moderna has asked the Food and Drug Administration to authorize a fourth shot of its COVID-19 vaccine as a booster dose for all adults.

The World Health Organization is creating a global training center to help poorer countries make vaccines, antibodies and cancer treatments using the messenger RNA technology used to make COVID-19 vaccines.

Egypt, Kenya, Nigeria, Senegal, South Africa and Tunisia will be the first African countries to receive the technology required to produce mRNA vaccines on the continent.

Tokyo has launched a mass inoculation drive for COVID-19 booster shots at a temporary center operated by the military as Japan tries to speed up delayed third jabs to counter surging infections.

Moderna has begun testing an omicron-specific version of its COVID-19 vaccine in healthy adults.

Haiti's health minister says the country is fighting a rise in COVID-19 cases as the government struggles to convince people to get vaccinated.

U.S. officials are loosening rules that call on health care workers to stay out of work for 10 days if they test positive for COVID-19.

As Americans get ready for the holidays, COVID-19 cases are surging in parts of the United States.

Moderna said Monday that a booster dose of its COVID-19 vaccine should offer protection against the rapidly spreading omicron variant.

U.S. health officials say most Americans should get the Pfizer or Moderna vaccines instead of the Johnson & Johnson shot.

Vaccine makers are racing to update their COVID-19 shots against omicron even before it’s clear a change is needed, just in case.

New York City instituted a new mask mandate Tuesday as the stock market was down over renewed COVID fears.

Asian shares are mixed as investors continue to cautiously weigh how much damage the new omicron coronavirus variant may unleash on the global economy.

The U.S. is opening COVID-19 vaccine boosters to all adults, and urging them for anyone 50 and older.

The NBA has told its players, coaches and referees that they should receive booster shots against the coronavirus, with particular urgency for those who received the single-dose Johnson & Johnson vaccine.

The city of Jacksonville, in partnership with Agape Family Health and the Florida Department of Health in Duval County, on Thursday announced additional COVID-19 vaccination services at four city-funded locations.

Moderna is scaling back expectations for the number of COVID-19 vaccine deliveries it expects to make this year and the revenue it will record from them.

Moderna says it will make up to 110 million doses of its COVID-19 vaccine available to African countries.

Moderna says its low-dose COVID-19 vaccine is safe and appears to work in 6- to 11-year-olds.

Georgia officials say local health departments will begin offering more COVID-19 vaccine booster shots on Tuesday, following guidance from the U.S. Centers for Disease Control and Prevention.

A team of young scientists in South Africa is assembling the equipment needed to reverse engineer Moderna's coronavirus vaccine.

Millions more Americans are now eligible for COVID-19 boosters, and they can get a different vaccine than their first shots.

Federal health officials say millions more Americans can get a COVID-19 booster and choose a different vaccine for that next shot.

U.S. regulators are extending COVID-19 boosters to Americans who got the Moderna or Johnson & Johnson vaccine.

Federal regulators are expected to authorize the mixing and matching of COVID-19 booster shots this week.

COVID-19 booster shots are an extra dose of the original vaccine, and some experts wonder why they weren't updated to better match the delta variant.

A panel of U.S. health advisers has endorsed booster shots for Moderna’s COVID-19 vaccine.

With many Americans who got Pfizer vaccinations already rolling up their sleeves for a booster shot, millions of others who received the Moderna or Johnson & Johnson vaccine wait anxiously to learn when it’s their turn.