Guidance on an additional dose of COVID-19 vaccines in the spring for individuals at high risk of severe illness due to COVID-19

Starting in the spring of 2024, NACI recommends that the following individuals who are at increased risk of severe illness from COVID-19 may receive an additional dose of XBB.1.5 COVID-19 vaccine:

• Adults 65 years of age and older
• Adult residents of long-term care homes and other congregate living settings for seniors
• Individuals 6 months and age and older who are moderately to severely immunocompromised (due to an underlying condition or treatment)

(Discretionary NACI recommendation)

• The added benefit of a spring COVID-19 vaccine program will depend on a number of factors; information on some of these factors is not yet available and may also vary by jurisdiction. Table 2 identifies factors that support a spring program and considerations that are currently unknown.