A fisherman paddles through mangrove trees at the Tam Giang Lagoon in the Hue province of Vietnam. Mangroves lose all their leaves in winter, exposing their whitish trunks. Trung Pham Huy hide caption

Weightlifting or other forms of strength training can be a smart addition to your exercise routines. It can help stave off chronic illness and manage weight gain. gradyreese/Getty Images hide caption

Alicia Caton, left, with her father Larry, and daughter, Mia. Larry Caton hide caption

When working out in the summer, watch for the signs of dehydration and heat stroke. Choosing a later evening or early morning time for a run in one smart way to stay safe. RyanJLane/Getty Images hide caption

We asked NPR readers to share the items they can't live without in the pandemic. From left to right: Kenji Hall with his traditional Japanese pot, Trish Kandik with her foster dog Penelope and Lauren Morton with a takeout container of Indian food. Kenji Hall, Trish Kandik, Lauren Morton hide caption

First prize went to this image of a porter in Kolkata. Photographer Tom Price took the image, then created a different backdrop: an empty, unidentified landscape emphasizing the loneliness of the migrant worker. Tom Price/All About Photo Awards hide caption

Left: A drawing of a human with a cow head holding a needle menacingly toward a child as he administers a tainted smallpox vaccination was meant to sow distrust of smallpox vaccines. Right: Protesters against COVID-19 vaccinations hold a rally in Sydney in February. Bettman/Getty Images; Brook Mitchell/Getty Images hide caption

Medical first aid is actually not what we're focused on in this situation, says Ampara Vilasmil, a mental health activity manager for a camp set up by MSF in Montepuez. Most of the people that come to the camps are hungry and tired but physically fine. It's actually psychological first aid they need to help them deal with the trauma they've been through. Alfredo Zuniga/AFP via Getty Images hide caption

World Health Organization investigative team member Peter Daszak (shown here during a trip to China in February) tells NPR that the group's report calls for additional research on farms that breed exotic animals in southern China. Hector Retamal/AFP via Getty Images hide caption

Rohingya refugees at a work training center in Indonesia's Aceh province. Dr. Paul Spiegel of Johns Hopkins University's Center for Humanitarian Health is looking at the data that have been collected on refugees and other vulnerable populations. It's far from complete, he says, but he has been surprised by the impact of COVID-19 among Rohingya. Khalis Surry/Anadolu Agency via Getty Images hide caption

Ghana is the first country to receive a shipment of COVID-19 vaccines from the global COVAX program. Above: The vaccines are unloaded at the Kotoka International Airport in Accra on February 24. Nipah Dennis/AFP via Getty Images hide caption

Smoke billows during a fire in an area of the Amazon rainforest near Humaita, Brazil, on Aug. 17. Ueslei Marcelino/Reuters hide caption

The next time your dental hygienist inquires about how often you floss, flash those sparkling teeth and reply, "All the time!" Pulse/Getty Images hide caption