COVID-19 vaccination effectiveness and safety in vulnerable populations: a meta-analysis of 33 observational studies

Conclusion: Seroconversion rates after COVID-19 vaccination were generally worse in the vulnerable than healthy populations, but there was no difference in adverse events. Patients with hematological cancers had the lowest IgG antibody levels of all the vulnerable populations, so closer attention to these patients is recommended. Subjects who received the combined vaccine had higher antibody levels than those who received the single vaccine.
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research