We know now that fully vaccinated people can avoid serious illness or death from COVID-19, but not a lot is known about whether vaccines prevent long COVID, a condition whose symptoms can range from shortness of breath to psychosis. But as reporter Nanette Asimov tells host Cecilia Lei, researchers are starting to learn how the shot can help prevent and lessen the disease. Plus: A fully vaccinated woman who's had long COVID for months talks about her often-frightening situation. | Unlimited Chronicle access: sfchronicle.com/pod Learn more about your ad choices. Visit megaphone.fm/adchoices