People who were eligible for a monkeypox vaccine but did not receive one were about 14 times more likely to become infected than those who were vaccinated, according to preliminary data released Wednesday by the Centers for Disease Control and Prevention (CDC).

The data is also based on people who received just a single dose of the vaccine.

Still, she said laboratory studies show that immune protection is highest two weeks after the second dose of vaccine, so they are continuing to strongly recommend people get two doses of Jynneos spaced out 28 days apart.