21.6. Analysis.
Comparison 21: Safety: bacterial or viral infections, immune overload, Outcome 6: Self‐controlled case series ‐ varicella zoster
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.