Joe Palca

Two studies that have not yet been peer reviewed indicate increased protection against the infectious omicron variant.

The deployment of the shade on the $10 billion telescope began Tuesday with the successful lowering of two arms known as Unitized Pallet Structures.

The James Webb Space Telescope is on its ways to its parking place a million miles from Earth. What do scientists plan to do with it once it is operational?

The James Webb Space Telescope is on the way to its final destination, about a million miles from Earth. From there, it will make unprecedented observations of the universe.

The James Webb Space Telescope, the most powerful telescope ever put into space, launched December 25. Astronomers are watching and waiting at mission control in Baltimore.

NASA is getting ready to launch the James Webb Space Telescope, the successor to the iconic Hubble Space Telescope. At mission control in Baltimore, Md., astronomers are getting ready.

The Food and Drug Administration has granted Emergency Use Authorization to a second COVID-19 antiviral therapy. This one comes from drug maker Merck.

Pfizer has received emergency use authorization for a COVID-19 pill, giving doctors a new tool for treating the virus. Who qualifies to take it and is it expected to work against the omicron variant?

New treatments for COVID-19 is expected to get Emergency Use Authorization from the Food and Drug Administration soon. But how much of the drug will be available, and how soon?

The Food and Drug Administration has now extended it authorization for Pfizer/BioNTech's COVID-19 vaccine booster to everyone 16 and older.

A vaccine from a Canadian biotech firm Medicago has been found to be effective at preventing moderate to severe disease. It could soon become the first plant-based vaccine authorized for human use.

Pfizer researchers looking for a drug to treat SARS found clues that gave the company a head start in its quest for a pill to treat COVID-19, including the omicron variant.

Protein subunit vaccines work by injecting people with a tiny portion of a virus. In the case of the COVID-19 vaccine, that tiny portion is the spike protein that the coronavirus uses to enter cells.

The omicron variant of the not been found in the United States yet. Here's what's we known about it, how dangerous it's likely to be, and whether vaccines or new drugs will be effective against it.

Whatever happened to Novavax and Sanofi's COVID-19 vaccines? Many people thought at the beginning of the pandemic that these were the two most likely vaccines to succeed.

The US Food and Drug Administration has authorized COVID vaccine boosters for all adults. We look at what this means for people who are considering getting their third shot.

The companies say a study of more than 10,000 volunteers showed a vaccine efficacy of 95% or greater for people receiving the booster.

Are vaccinated people who get COVID as likely to spread the infection as unvaccinated people? Scientists don't think so.

Can a vaccinated person with a breakthrough infection infect others? Conventional wisdom says yes, but new research says it's not all that likely.

Pharmaceutical giant Merck announced promising results from a study of a new antiviral drug. Molnupiravir reduced COVID hospitalizations or death by 50% in a trial involving 775 volunteers.