When it's cold outside, is it safe to bring a socially distanced gathering into your house if the windows are open for a short bit and then shut so indoor temperatures don't plummet? We answer this question below. Tessa Bunney/Corbis via Getty Images hide caption
An illegal roadside graveyard in northeastern Namibia. People in the townships surrounding Rundu, a town on the border to Angola, are too poor to afford a funeral plot at the municipal graveyard — and resorted to burying their dead next to a dusty gravel road just outside of the town. Brigitte Weidlich/AFP via Getty Images hide caption
Left: Xi Lu traveled to Wuhan from London in January to spend Lunar New Year with his parents, having not shared the holiday with them in over 7 years. Lin Yang, an epidemiologist at Hong Kong Polytechnic University, traveled to Wuhan to visit her parents for the Lunar New Year. And then ... they couldn't get back home because of the quarantine. Xi Lu/ Lin Yang 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
A fan wears a neck gaiter as he watches the Los Angeles Dodgers play at home against the San Francisco Giants last week. Gina Ferazzi/Los Angeles Times via Getty Images hide caption
Left: Jana De Brauwere, a contact tracer in California. Right: Rachel Saykpah, a nurse in Liberia who has overseen contact tracers in Africa since 2014. Jana De Brauwere; Rachel Saykpah hide caption
From left: Maria Nakalanda, Edward Arineitwe and Charles Batte are Ugandan health-care workers who've had to rethink their commute after their country announced transportation restrictions. Maria Nakalanda; Edward Arineitwe; Charles Batte hide caption
President Trump at the daily coronavirus briefing on Tuesday, when he declared his intent to halt funding to the World Health Organization; and Tedros Adhanom Ghebreyesus, director-general of the WHO. Alex Brandon/AP; Fabrice Coffrini/AFP via Getty Images hide caption
Countries under coronavirus lockdowns should only ease those restrictions if they can control new infections and trace contacts, the World Health Organization says. Here, Hashim, a health care worker, recently greeted his daughter through a glass door as they maintained social distance due to the COVID-19 outbreak in New Rochelle, N.Y. Joy Malone/Reuters hide caption
Rohingya refugees wait at a relief distribution point in the Kutupalong refugee camp in Bangladesh on March 24. Suzauddin Rubel/AFP via Getty Images hide caption
Coffins of deceased people stored in a warehouse near Bergamo — a city at the heart of Italy's coronavirus crisis — before being transported to another region for cremation. Piero Cruciatti/AFP via Getty Images hide caption
An office worker is screened with an infrared thermometer as he enters a building in New Delhi, India. Prashanth Vishwanathan/Bloomberg via Getty Images hide caption
The World Health Organization called the COVID-19 viral disease a pandemic Wednesday. Here, workers in Spain place a medical mask on a figure that was to be part of the Fallas festival in Valencia. The festival has been canceled over the coronavirus outbreak. Alberto Saiz/AP hide caption