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.
More than two decades ago, we viewed helper T cells as having two major fates, Th1 and Th2 cells. But now we recognize the new diversity of helper T cells including Th17, Th9, Th22, Tfh and different types of regulatory T cells.
