Recommendations for Influenza Vaccine Composition

Southern hemisphere: May-October 2001

It is recommended that vaccines to be used in the 2001 season (southern hemisphere winter) contain the following:

  • an A/Moscow/10/99 (H3N2)-like virus*
  • an A/New Caledonia/20/99 (H1N1)-like virus
  • a B/Sichuan/379/99-like virus

* The widely used vaccine strain is A/Panama/2007/99, which is an A/Moscow/10/99-like virus.

(from Weekly Epidemiological Record, Vol.75, 41, 2000 )