Karen Weintraub, USA TODAY

Karen Weintraub


Cambridge, MA, United States

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Recent articles by Karen:

Pfizer's COVID vaccine appears safe and effective for children 5-11, new data shows

FDA and CDC will decide soon if the benefits of the COVID-19 vaccine from Pfizer outweighs the risks and allows it for 28 million kids. → Read More

FDA OKs mixing COVID vaccine boosters, backs Moderna, J&J boosters

The CDC still needs to sign off on the measure before booster shots of the Moderna and Johnson and Johnson vaccines become available. → Read More

Natural immunity is good. Getting vaccinated after being sick with COVID-19 is better.

A growing body of research suggests previous coronavirus infection plus vaccination provides the strongest protection against COVID-19. → Read More

Natural immunity is good. Getting vaccinated after being sick with COVID-19 is better.

A growing body of research suggests previous coronavirus infection plus vaccination provides the strongest protection against COVID-19. → Read More

New antiviral is highly effective, study finds, and is stirring hope that COVID-19 could be treated by a pill

An experimental drug prevented half of COVID-19 infections that would otherwise have sent people to the hospital, according to a study released Friday → Read More

CDC endorses COVID-19 vaccine boosters for people 65 and older, high-risk patients

The CDC endorsed booster shots for millions of older and high-risk Americans, opening a major new phase in the U.S vaccination drive against COVID-19. → Read More

Who should get COVID-19 boosters first? CDC committee set to vote Thursday – but only on Pfizer vaccine

Among the more than 20,000 people who have been tracked after receiving a third dose, no major safety concerns have popped up, CDC officials say. → Read More

Pfizer-BioNTech say low dose of its COVID-19 vaccine is safe and effective for kids 5-11

Pfizer-BioNTech's COVID-19 vaccine is safe and effective for children ages 5 to 11 at one-third the dose used in adolescents and adults. → Read More

FDA panel approves Pfizer-BioNTech COVID-19 booster shots only for people 65 and older or at high risk

There isn’t yet sufficient evidence to support boosters for people under 65, the FDA Vaccines and Related Biological Products Advisory Committee said. → Read More

CDC panel backs full licensing of Pfizer-BioNTech COVID-19 vaccine

The Advisory Committee on Immunization Practices publicly reviewed data for the first time that supported Pfizer's COVID vaccine's full authorization. → Read More

COVID-19 vaccines for children under 12: When are they coming?

Parents of young children are worried. Here's what you need to know about why COVID vaccines are taking so long for kids and when they are expected. → Read More

Pfizer's vaccine is FDA-approved for adults, but it's still a 'no-no' to vaccinate kids under 12

Children under 12 have not yet been approved to receive any COVID-19 vaccine, despite the FDA's approval of the Pfizer-BioNTech shot on Monday. → Read More

FDA authorizes COVID-19 vaccine boosters for the immunocompromised

People with suppressed immune systems may not have gotten adequate protection from initial doses of COVID vaccine and may need a booster, FDA says. → Read More

Researchers are concerned about the possibility that COVID-19 might lead to dementia

In several trials made public Thursday, scientists have found changes in brain function after hospitalization with COVID-19. → Read More

Mask guidelines are getting confusing if you're vaccinated against COVID. Experts break down the details.

CDC Director Rochelle Walensky and other experts say people vaccinated against COVID are protected, but local officials may decide masks are needed. → Read More

Deleted gene sequences confirm coronavirus circulated before Wuhan seafood market

A new report does not answer whether the SARS-CoV-2 virus jumped directly from animals to people or was accidently leaked from a Chinese research lab. → Read More

The same mRNA technology used in COVID-19 vaccines could help treat cancer

Fighting COVID-19 proved a boon to cancer research. Here's how scientists are using the same mRNA technology to attack tumors. → Read More

Why it's been relatively easy to vaccinate against COVID-19 compared to HIV or cancer

Why has it been so easy to vaccinate against COVID-19 when other medical problems remain intractable? Biology. → Read More

Novavax vaccine over 90% effective in protecting against COVID-19 infection, study shows

Novavax, one of five COVID vaccine-makers to receive large federal grants, says its shots are more than 90% effective against infection. → Read More

Johnson & Johnson COVID-19 vaccine protects against virus variants, study shows

In the new study, Harvard researchers who developed the J&J COVID-19 vaccine found it protected against severe disease regardless of the variant. → Read More