CNN Health

Health experts on Saturday continued to urge communities to use caution and planning when considering whether to send students back to school, after the US got its first glimpse this week at how Covid-19 could reshape education.

A multistate outbreak of salmonella poisoning that has sickened almost 400 people in 31 states has been traced back to red onions, federal health officials said.

Tedros Adhanom Ghebreyesus was watching late-night television when he saw a hospital boss criticizing him and Ethiopia's Health Ministry, which he was leading at the time, for doing a terrible job. Instead of responding with a furious diatribe, as some political leaders might when watching their detractors on TV, he contacted the man, Dr. Kesete Admasu.

Wearing personal protective equipment (PPE) when caring for patients with Covid-19 isn't enough to completely eliminate the threat from the virus for frontline workers, according to a new study from King's College London.

Brazil's President Jair Bolsonaro said on Thursday he felt weak and might have "mold in the lung" having spent weeks in isolation after catching Covid-19.

A Covid-19 outbreak at a Georgia sleep away camp this June could have implications for school reopening, the US Centers for Disease Control and Prevention said.

The "diversity of response" by US states hampered the country's ability to contain the spread of the coronavirus, Dr. Anthony Fauci said at a congressional hearing on Friday, as the number of cases in the US topped 4.5 million.

More than 340 years ago, a Dutchman named Antonie van Leeuwenhoek invented a powerful new compound microscope and accidentally discovered the existence of bacteria, a groundbreaking achievement that changed the course of medicine.

Florida on Friday marked the fourth consecutive day it reported a record number of Covid-19 deaths in the state.

Stephanie Odili knew something was wrong when her stomach ballooned to three times its usual size.

Drug giants GlaxoSmithKline and Sanofi Pasteur said Friday they had won a commitment from the US federal government to pay up to $2.1 billion to help the two companies move forward with their proposed joint coronavirus vaccine as part of Operation Warp Speed.

Over 900 people in 48 states have been infected with salmonella, and their illnesses are likely linked to backyard poultry like chicks and ducklings.

Dr. Alin Gragossian gets it. Wearing a mask, social distancing, frequently washing your hands, using a sanitizing gel or wipe on everything you touch -- all that gets old, fast.

Michelle Burnett just landed a new job, and she's excited to be heading back to work next week for the first time in months. But there's another upcoming date that's filling her with dread: the first day of school.

Moncef Slaoui, head of the government's effort to develop a vaccine against Covid-19, says he expects the vaccine to have efficacy rates "in the 90%" range -- but that there might not be enough vaccine available for all Americans until the end of next year.

Researchers on Wednesday published scathing critiques of a study President Trump repeatedly touted on Twitter. That study, published earlier this month in the International Journal of Infectious Diseases, claimed to show that hydroxychloroquine saved lives.

Buddy, a 7-year-old German shepherd from Staten Island, New York, was the first dog to test positive for the coronavirus in the United States. He died on July 11 after a three-month illness, according to National Geographic.