Latest from Ben Guarino

You got a coronavirus vaccine. But you still became infected. How did that happen?

Infections among some immunized people "are to be expected, even when you have highly effective vaccines," one infectious-disease specialist said.
  • Jul 21, 2021

You had the Johnson & Johnson coronavirus vaccine. Should you try to get a booster dose of Pfizer or Moderna?

As the delta variant spreads, people who had the Johnson & Johnson vaccine may be seeking a dose of an mRNA vaccine. Here's what experts told The Washington Post about combining those vaccines.
  • Jul 4, 2021

Seattle scientist digs up deleted coronavirus genetic data, adding fuel to the covid origin debate

NIH said a researcher asked for data, already published, to be deleted from a database.
  • Jun 23, 2021

Spread of delta coronavirus variant exposes poorly vaccinated regions to renewed danger

Now at 20 percent of new U.S. infections, the variant that overwhelmed India and Britain threatens some parts of the country again, experts say.
  • Jun 23, 2021

Scientists begin to unravel the mysteries of the coronavirus and brains

Even as the pandemic appears ready to recede in the United States, dropping below an average of 30,000 new cases daily, it will take years to more fully understand the way the virus afflicts the brain.
  • Jun 7, 2021

Top U.S. health official calls for follow-up investigation into pandemic’s origins

The theory that the virus came from a lab in Wuhan, China, has gained traction amid criticism of an international probe and reports that several workers there were ill in November 2019 — weeks before the virus was officially identified.
  • May 26, 2021

CDC’s mask guidance spurs confusion and criticism, as well as celebration

Telling vaccinated people they can discard their masks signals the power of the shots, but critics say the move is hasty and difficult to implement with a majority of Americans still unprotected.
  • May 14, 2021

Vaccinated? Great. But wear a mask when indoors or in crowds, experts say.

The CDC recommendations for mask-wearing among fully vaccinated people — who can take them off in private but should wear them in public — are "absolutely appropriate," one expert said.
  • Apr 27, 2021

Can you spread the coronavirus if you’re vaccinated? Post reporters answer your questions.

Send us your questions and Post reporters will respond with answers on Monday, April 19.
  • Apr 19, 2021

WHO report leaves unsettled ‘lab-leak’ theory on origins of covid pandemic

The director of the World Health Organization may have breathed new life into the theory, often dismissed as a political distraction, that the coronavirus came from a lab in China.
  • Mar 30, 2021