Both the Finnish and the U.S. bird flu vaccines are made by CSL Seqirus but are different vaccines. In the summer, U.S. officials stockpiled 4.8 million doses of the vaccine that officials said was effective against circulating H5N1 strains. In October, the U.S. issued a $72 million grant to three manufacturers to double the nation's stockpile.

A Wyoming woman hospitalized with bird flu is the state's first human case after her flock of chickens became infected and died, according to state officials.