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.
(a) Monthly distribution of norovirus genotypes, August 2001–July 2009 and (b) distribution of genotype II.4 variants in seasons 2001/2002 to 2008/2009 in outbreaks with samples analysed at the Consultant Laboratory for Noroviruses (CL). n, Total number of samples at CL; GII other=II.5, II.8, II.12, II.14, II.20, GII/GI mix; GII recomb = II.b, II.d, II.e, II.g.
