This year’s uptake of the updated Covid-19 vaccine appears to be somewhat slower than last year’s, according to data from the US Department of Health and Human Services and the US Centers for Disease Control and Prevention.

More than 7 million Americans have received a dose of the latest vaccines, HHS said Thursday. The CDC recommended vaccines from Moderna and Pfizer/BioNTech for everyone 6 months and older on September 12; an updated vaccine from Novavax became available this month and is recommended for people 12 and over.