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.
Body mass of black-headed gulls after the first, second, and third LPAIV H13N2 or H16N3 inoculations from days 0 to 14 postinoculation. Black lines indicate the first inoculation, gray lines indicate the second inoculation, and dashed lines indicate the third inoculation. a, the second inoculation of groups 5 and 7 was unsuccessful.
