Some people may soon be getting a fourth shot of the COVID-19 vaccine.

New CDC guidelines say people with certain health conditions that make them immunocompromised may need another shot.

Those people can get that fourth shot at least six months after getting their third shot.

The CDC authorized a third dose for immunocompromised people 18 and older in August.

A study from Johns Hopkins University this summer showed vaccinated, immunocompromised people were 485 times more likely to end up in the hospital or die from COVID-19 compared to most vaccinated people.