CDC Advisers Recommend Spring Covid Booster for Older Americans The CDC advises that people aged 65 and older should receive a second dose of the latest Covid vaccine this spring. This booster shot aims to enhance protection, especially for older adults and those with compromised immune systems. The CDC's recommendation comes after preliminary data showed the effectiveness of the latest vaccines against symptomatic infection and hospitalization. The agency's advisers have voted to strongly recommend the spring shot for older Americans.