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.
Nasal virus excretion after primary inoculation with human or swine H3N2 influenza virus and after challenge with sw/Gent/08. Mean virus titers in nasal swabs of each group are given. The horizontal broken line represents the detection limit (<1·7 log10 TCID 50/100 mg).
