The National Comprehensive Cancer Network (NCCN) recommends new bivalent COVID-19 booster vaccine for cancer patients, amid other updates.
The CDC now recommends additional vaccine doses for moderately or severely immunocompromised people (such as those on active chemotherapy and transplant recipients).
Unlike other viruses that have been around for decades, COVID continues to evolve, as does the research about how effective the vaccines are in protecting people against new or recurring cases.