The Food and Drug Administration appears poised to make available the COVID-19 vaccines that target omicron as a second booster for people with weak immune systems and those ages 65 and older.

As case counts surge in China, rumors circulate about the effectiveness and safety of the made-in-China vaccines in use there. Here's what we know about CoronaVac and Sinopharm.

Public health officials want more Americans to get the latest COVID vaccine booster. Only 35% of people over 65 have gotten the shot, though 75% of COVID deaths are among people in this age group.

Scientists predict China will see the largest COVID surge of the pandemic this winter, with hundreds of millions of people infected. But some experts say that it could have been even worse.

There is a lot of information about coronavirus vaccines out there, and some of it seems vague or contradictory. We talked to experts to help answer some of the most common and confusing questions.

The COVID-19 vaccine strategy may be shifting toward Americans getting yearly vaccinations, like many do with annual flu shots.

The new shots from Moderna and Pfizer-BioNTech target both the original strain of the coronavirus and the omicron BA.4/BA.5 subvariants that most people are catching now.

The vaccine maker alleges that its rivals Pfizer and BioNTech used some patented features of its mRNA technology to develop their COVID vaccines.

Health care providers hope the Novavax COVID-19 vaccine will appeal to people who haven't recieved any doses of previous vaccine iterations. 

Adults who haven't gotten any COVID-19 shots should consider the new option, the agency said Tuesday. The spike protein vaccine is more typical than the mRNA types being broadly used against COVID.

A committee of experts voted unanimously to recommend that the Food and Drug Administration authorize COVID-19 vaccines from Moderna and Pfizer-BioNTech for children as young as 6-months-old.

The variants — BA.2.12 and BA.2.12.1 — have been detected in New York and other states as well as 5 other countries. One has a mutation that seems to give it an edge in evading the immune system.

My 6-year-old has been exposed to SARS-CoV-2 at least four times and never tested positive. Many people fall into that category. Researchers have theories about why they've been able to ward it off.

The vaccinators are going door-to-door in what the government is calling an unprecedented effort, toting coolers with a mix of COVID vaccine types.

The consensus has been that Pfizer and Moderna are most protective. But a study looking at 5 vaccines — including Russia's Sputnik V and two Chinese types — offers an unexpected finding.