Adults who smoke, are taking any anti-inflammatory drugs, or have certain other chronic conditions including high blood pressure, kidney or heart disease or diabetes are among the group of people who could be considered for a booster shot.
This treatment, called immunoglobulin A (IAGA), is already recommended for those with heart disease, among others.
A federal panel of experts decided unanimously that an expansion of the guidelines for those with other conditions was merited, though it did outline a list of conditions that adults should not be eligible for booster shots.
The update announced last week does not cover those with asthma. In earlier surveys, pediatricians have reported that many of their patients lack access to the medication.
An estimated 10 million adults in the U.S. have heart disease, nearly 200,000 have asthma, and 5 percent of the U.S. population are living with high blood pressure, according to the health department. The new guidelines will determine the percentage of those population eligible for IGA.