Betsy Arakawa was killed by Hantavirus earlier this year, and health experts in California are worried about the number of cases so early in the season

Hantavirus pulmonary syndrome, a rare and fatal disease, has led to three deaths in California, including the wife of actor Gene Hackman. Health officials stress the importance of controlling rodent activities to prevent the disease,

The extremely rare disease, which is spread by rodents, claimed the life of Gene Hackman's wife, Betsy Arakawa, in New Mexico in February.