The Centers for Disease Control and Prevention on Thursday issued a health advisory urging those who are pregnant, lactating, and trying to get pregnant to get a COVID-19 vaccine. The public-health agency said 31% of people who are pregnant have been vaccinated, a figure that is much lower than the 65% of people in the U.S. who are eligible for a shot and are fully vaccinated. There have been at least 125,000 pregnant individuals with confirmed cases of COVID-19; 22,000 have been hospitalized and 161 people died. Pregnancy can put people at higher risk of severe illness, hospitalization, and death if they contract the virus. They also have a higher risk of preterm birth, according to the CDC.