A group of 34 health experts warned about the perils of new U.S. rules on virus data collection. Penn State is requiring students to sign a waiver absolving the university of liability for exposure to the virus on campus.

Governments and restaurant owners wanted to get back to business. But bars and restaurants have become a focal point for clusters of Covid infections.

The pandemic has resulted in fewer resources for breastfeeding women, but experts say it’s still crucial to seek guidance.

Russia approved a vaccine that has yet to complete clinical trials. The White House announced a deal to manufacture 100 million doses of its vaccine candidate. New Zealand returned to a partial lockdown.

For service members like me, Tricare health insurance and the limited number of military medical facilities offering fertility treatments add more stress to an already emotional process.

Vaccines are among the safest medical products in the world — but only because of the intense rigor of the clinical trials that test their safety and effectiveness.

The E.P.A. has approved nootkatone, which is found in cedars and grapefruit. It repels ticks, mosquitoes and other dangerous bugs for hours, but is safe enough to eat.

The country became the first in the world to approve a possible vaccine against the virus, despite warnings from the global authorities against cutting corners.

The Trump administration is ordering schools on Native American reservations to reopen. California’s chief health officer has resigned. The pandemic has now sickened more than 20 million people, according to a Times database.

Can women be prosecuted for murder after a stillbirth? The case of Chelsea Becker in Kings County hinges on the courts’ interpretation of a small subsection in the state’s penal code.

The pandemic could change unexpected parts of our lives for years to come, experts say.

Airborne virus plays a significant role in community transmission, many experts believe. A new study fills in the missing piece: Floating virus can infect cells.

“They ask you if you’re coming in to take the trash out — stuff they wouldn’t ask a physician who was a white male.”

The highest-level American visit to Taiwan in decades shows the island’s importance as ties between the United States and China deteriorate.

Everyone is stressed and anxious now. We have to find and help the children who are hurting most.

Trump’s unilateral economic relief actions come under fire. Ohio’s governor urges use of rapid tests, but with caution after his false positive.

Many medical experts — including members of his own staff — worry about whether Dr. Hahn has the fortitude and political savvy to protect the scientific integrity of the F.D.A. from Mr. Trump.

Usually during an economic downturn, people tend to spend less on health care for pets. This time, the opposite is happening.

Recent research, which found a link between pyrethroids and deaths from heart disease, highlights the limitations of epidemiological research.

Grocery chains, including Publix and Giant Eagle, have recalled onions supplied by Thomson International and products that may contain the onions.