Moderna stock jumped early Tuesday after the first bird-flu death was reported in the U.S.Shares were up 3.3% to $43.98 in premarket trading, after initially rising as much as 6%. Futures tracking the benchmark S&P 500 index traded largely flat.

A person in Louisiana who became severely ill with a bird flu virus known as H5N1 in December has passed away from the infection, marking the first known bird flu death in the US

The risk to the general population from H5N1 bird flu remains low, a World Health Organization spokesperson said on Tuesday, following the first death of a patient from the virus in the United States.