A dose of the measles, mumps and rubella vaccine. When an unvaccinated person is exposed to measles, public health guidance if for them to get vaccinated within three days. Joe Raedle/Getty Images hide caption
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The potentially fatal disease diphtheria is caused by bacteria — the club-shaped, Gram-positive, Corynebacterium diphtheriae bacilli shown in this microscope photo. CDC via AP hide caption
9 year-old Josie Murdoch holds her vaccination card at Chapel Hill Pediatrics and Adolescents after being innoculated with the Pfizer child COVID-19 vaccination in Chapel Hill, N.C., Thursday, Nov. 4, 2021. Gerry Broome/AP hide caption
Student pharmacist Charles Liu administered a dose of mpox vaccine at a Los Angeles County Department of Public Health clinic in West Hollywood, Calif., last August. Mario Tama/Getty Images hide caption
Vaccination and awareness could help keep mpox in check this summer
U.S. infectious disease experts fear that a winter surge of respiratory illness — like the one that overloaded emergency rooms with COVID-19 patients in January 2021 — could yet materialize this winter, with several circulating viruses wreaking havoc. So far, though, it looks like early peaks of RSV and the flu are receding. Mario Tama/Getty Images hide caption
RSV recedes and flu peaks as a new COVID variant shoots 'up like a rocket'
Minda Dentler handcycling at mile 32 of The Kona Ironman in Hawaii, 2013. She's the first female wheelchair athlete to complete the Ironman World Championship. When she was an infant, her legs were paralyzed by polio. "I wish all people who may be on the fence about vaccination could really meet me," she says. "I'm a reminder to families that they should vaccinate their children." Kevin Charboneau hide caption
Striving to outrace polio: What's it like living with the disease
Patricia Neves (left) and Ana Paula Ano Bom helped launch a global project to revolutionize access to mRNA technology. Ian Cheibub for NPR hide caption
The Brazilian Scientists Inventing An mRNA Vaccine — And Sharing The Recipe
Patricia Neves (left) and Ana Paula Ano Bom take a break at the institute in Rio de Janeiro where they work. The two scientists say they've been inseparable since they met in college. Now their friendship has made it possible to launch a remarkable partnership to make mRNA vaccines accessible to the world. Ian Cheibub for NPR hide caption
These Brazilian besties are inventing an mRNA vaccine as a gift to the world
A resident receives a dose of the Pfizer COVID-19 vaccine at a health center in Jakarta, Indonesia, on Jan. 13. This week, Indonesia started a program to give booster shots to the elderly and people at risk of severe disease. Dimas Ardian/Bloomberg via Getty Images hide caption
Licensed practical nurse Yokasta Castro, of Warwick, R.I., draws a Moderna COVID-19 vaccine into a syringe. The vaccines have now been linked to minor changes in menstruation, but are still considered safe. Steven Senne/AP hide caption
COVID vaccines may briefly change your menstrual cycle, but you should still get one
People wearing face mask to protect against the coronavirus as they walk in front of St. Stephen's Cathedral on Wednesday in Vienna, Austria. Michael Gruber/AP hide caption
A woman receives a Pfizer vaccination booster shot from a nurse in Los Angeles. California Department of Public Health officials say that no fully vaccinated adult should be denied a COVID-19 booster shot in the state. Gary Coronado/Los Angeles Times via Getty Imag hide caption
People demonstrate against Italy's "green pass" on Saturday in Rome. Stefano Montesi/Corbis via Getty Images hide caption
Students head to class this month in Thornton, Colo. Infectious disease experts say the decline in vaccination rates against childhood diseases during the pandemic has increased the potential for outbreaks of diseases once largely vanquished in the United States. RJ Sangosti/MediaNews Group/The Denver Post via Getty Images hide caption
Many Kids Have Missed Routine Vaccines, Worrying Doctors As School Starts
Roger West (right) columnist of the Westside Journal, looks over news copy with his wife Dawn, owner and publisher, on Aug. 10. Outspoken as he had been in opposing COVID-19 vaccines West reconsidered after the virus returned with a deadly vengeance in mid-July. John Raoux/AP hide caption
Raiders fans do the wave during last weekend's preseason game in Las Vegas as a stadium sign reminds them to wear face masks. The team now says spectators will have to show proof of vaccination — and that no masks will be required for those who have been vaccinated. Ethan Miller/Getty Images hide caption
Xavier Becerra, then nominee for secretary of Health and Human Services, puts on his protective mask at his Senate Finance Committee confirmation hearing in February. Greg Nash/The Hill/Bloomberg via Getty Images hide caption
California Gov. Gavin Newsom appears at a news conference in Oakland, Calif., on July 26. On Wednesday, he announced that the state's teachers and school staff will be required to be vaccinated for COVID-19 or undergo weekly testing. Jeff Chiu/AP hide caption
Employees elbow bump at a JLL office in Menlo Park, Calif., in September. With the delta variant surging, mask mandates are returning, and some employers are now requiring employees to be vaccinated before coming to the office. David Paul Morris/Bloomberg via Getty Images hide caption
Back To The Office? Not Yet. Companies Scramble To Adjust To The Delta Variant
Solid research has found the vaccines authorized for use against COVID-19 to be safe and effective. But some anti-vaccine activists are mischaracterizing government data to imply the jabs are dangerous. Matt Slocum/AP hide caption
Anti-Vaccine Activists Use A Federal Database To Spread Fear About COVID Vaccines
Stickers are stacked up for people receiving vaccinations at a pop-up COVID-19 vaccination clinic in Las Vegas on May 21. As countries open their doors to travelers again, there is confusion about how people will prove their vaccination status. Ethan Miller/Getty Images hide caption
International Travel Opens To The Vaccinated, But How Do You Prove You Got The Shot?
People walk near the Chicago Theatre on Tuesday in the city's Loop community. The Centers for Disease Control and Prevention eased its guidelines on the wearing of masks, saying fully vaccinated Americans don't need to cover their faces anymore in most settings. Will it encourage the unvaccinated to get their shots? Shafkat Anowar/AP hide caption
In a bid to get more Ohioans vaccinated, Gov. Mike DeWine announced a $1 million lottery offer to adults who get at least one COVID-19 dose. Kids under 18 who get the vaccine will be entered into a lottery to get a scholarship. Phil Long/AP hide caption