Unvaccinated More Than Twice as Likely to Get Covid-19 Again, CDC Says

Unvaccinated people are more than twice as likely to be reinfected with Covid-19 than people who are fully vaccinated, a new study suggests, underscoring the importance of vaccines in containing the pandemic.

The study, published Friday by the Centers for Disease Control and Prevention, looked at nearly 250 patients in Kentucky who had Covid-19 in 2020 and tested positive again between May and June 2021. The authors compared the vaccination status of those patients with those of nearly 500 similar people who also had an infection in 2020 but hadn’t been...