Namibia's president says disparate global rates of vaccination represent "COVID apartheid." If you compare percentages of people vaccinated in the most populous countries, you can understand his ire.

As adults of all ages get access to the COVID-19 vaccines, health researchers worry that the trend could worsen.

People are using social media to proclaim joy at getting a jab. And that's not just boasting. Even in a world of vaccine inequity, these celebratory tweets and videos carry a vital message.

One of the hottest areas of research right now: studies to determine how well current vaccines work against emerging coronavirus "variants of concern."

One in four Americans say they won't get a coronavirus vaccine. Researchers say it could keep the nation from reaching a critical tipping point.

Not only does the new research show the Moderna and Pfizer vaccines are effective at protecting pregnant people, it also found that antibodies were present in umbilical cord blood and breast milk.

The three currently authorized vaccines are all safe for people with suppressed immune systems, scientists say. How effective they will be may depend on your treatment plan and when you get the shot.

As the pace of vaccination picks up, so do reports of spoiled doses. In Tennessee, close to 5,000 doses have been lost, prompting more oversight from state and federal officials.