Some European countries, such as Spain, are making plans for the time they might be able to treat SARS-CoV-2 as an endemic disease — one that's always around but fairly predictable. But the World Health Organization cautions that the pandemic is not over. Above: Masked pedestrians in Barcelona, Spain, in July 2021. Joan Mateu/AP hide caption
"We need to get out ahead of this and do everything we possibly can here in Massachusetts — through and in the aftermath of the surge," said Massachusetts Gov. Charlie Baker, in announcing his state's public health initiative April 3. Nicolaus Czarnecki/MediaNews Group/Boston Herald hide caption
Early symptoms of COVID-19 are much the same as those of the flu or a cold. Don't panic. Call your doctor to check in, if you're worried, but treating mild or moderate symptoms at home until you're well will protect you and help stop the spread of whatever you have. Guido Mieth/Getty Images hide caption
President Trump signs an $8.3 billion emergency spending bill in the White House Friday. That's significantly more than he originally requested from Congress. Jim Lo Scalzo/EPA/Bloomberg via Getty Images hide caption
Viral particles are colorized purple in this color-enhanced transmission electron micrograph from a COVID-19 patient in the United States. Computer modeling can help epidemiologists predict how and where the illness will move next. Hannah A Bullock and Azaibi Tamin/CDC/Science Source hide caption
Providence Sacred Heart Medical Center is part of the institution in Spokane, Wash., that is treating some of the first COVID-19 patients in the United States. Francis Joseph Dean/Corbis via Getty Images hide caption
"It's not going to be transported on a box," Dr. Michael Ison, an infectious disease specialist at Northwestern University, says of your chances of contracting the novel coronavirus from packages shipped from China. Don Emmert/AFP via Getty Images hide caption
A skull discovered at a sacred Aztec temple. A new study analyzed DNA extracted from the teeth of people who died in a 16th century epidemic that destroyed the Aztec empire, and found a type of salmonella may have caused the epidemic. Alexandre Meneghini/AP hide caption
Under the old rules, the CDC's authority was primarily limited to detaining travelers entering the U.S. or crossing state lines. With the new rules, the CDC would be able to detain people anywhere in the country, without getting approval from state and local officials. Mark Wilson/Getty Images hide caption
In 1962, a local leader in the Eastern Highlands of Papua New Guinea asks Fore men to stop the sorcery that he believes is killing women and children. Courtesy Shirley Lindenbaum hide caption
A mosquito control inspector in Miami-Dade County, Fla., looks for mosquito larvae in water from a storm drain. Joe Raedle/Getty Images hide caption
Mary Mallon, known as "Typhoid Mary," was immune to the typhoid she carried. Working as a cook, she spread the disease in New York and ended up quarantined on Brother Island (above) for more than two decades. Bettmann/Corbis hide caption
Kenyan health officials take the temperatures of passengers arriving at the Nairobi airport on Thursday. Kenya has no reported cases of Ebola, but it's a transportation hub and so is on alert. Simon Maina/AFP/Getty Images hide caption