virus

Registered pharmacist Sapana Patel, loads a syringe with monkeypox vaccine at a pop-up vaccination site on Wednesday, Aug. 3, 2022, in West Hollywood, Calif. Richard Vogel/AP hide caption

People protest during a rally calling for more government action to combat the spread of monkeypox at Foley Square on July 21, 2022 in New York City. Jeenah Moon/Getty Images hide caption

Sikhulile Moyo, the laboratory director at the Botswana-Harvard AIDS Institute Partnership and a research associate with the Harvard T.H. Chan School of Public Health, headed the team that identified the omicron variant. Leabaneng Natasha Moyo hide caption

The numerals in this illustration show the main mutation sites of the delta variant of the coronavirus, which is likely the most contagious version. Here, the virus's spike protein (red) binds to a receptor on a human cell (blue). Juan Gaertner/Science Source hide caption

Hospitalizations and deaths from the coronavirus continue to increase this month, with the number of Americans who died in a single day from the illness surpassing 3,600. Jae C. Hong/AP hide caption

Air conditioners on a building. Scientists say there has been too little research into the role of heating, ventilation and air conditioning systems in the spread of the coronavirus. Sami Sarkis/Getty Images hide caption

Research suggests that kids tend to get infected with the coronavirus less often, and have milder symptoms than adults. There's less consensus on how much kids can spread the illness. Dan Kenyon/Getty Images hide caption

A sign on the M8 motorway last week in Glasgow, Scotland. Jeff J. Mitchell/Getty Images hide caption

A colorized image of cells from a patient infected with the coronavirus SARS-CoV-2. The virus particles are colored pink. The image was captured from a scanning electron micrograph. NIAID/Flickr hide caption

President Trump and Irish Prime Minister Leo Varadkar joked about not shaking hands as they met at the White House on Thursday. Evan Vucci/AP hide caption

Staff in biohazard suits hold a metal stretcher on Tuesday by the inpatient department of Wuhan Medical Treatment Center, where some people infected with a novel coronavirus are being treated in China. Dake Kang/AP hide caption

Three U.S. airports will screen passengers from Wuhan, China, for coronavirus symptoms: Los Angeles International Airport (pictured above), JFK in New York and SFO in San Francisco. FG/Bauer-Griffin/GC Images hide caption

In these images, E. coli bacteria harbor proteins from a bacteria-killing virus that can eavesdrop on bacterial communication. At left, one protein from the virus has been tagged with a red marker. At right, the virus has overheard bacterial communication indicating the bacteria have achieved a quorum; it sends its protein to the poles of the cell (yellow dots). Bonnie Bassler and Justin Silpe, Department of Molecular Biology, Princeton University hide caption