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Vaccination against COVID-19 to lower the risk of long COVID, according to a growing body of research. A  by Israeli epidemiologists of evidence from the United Kingdom found vaccinated people generally had lower rates of long COVID compared to unvaccinated people. A separate study using Italian data a stronger association of long COVID symptoms in early 2021 when the Alpha variant of the virus was circulating than in 2020, when the original SARS-CoV-2 virus was circulating. The National Institutes of Health is conducting a $1.2 billion study of long COVID, but critics it is moving at a “glacial pace.” (NPR , 3/24/22)