‘More serious than we had hoped’: Bird flu deaths mount among California dairy cows Los Angeles TimesAs Bird Flu Spreads, Two New Cases Diagnosed in California The New York TimesTwo California dairy workers infected with bird flu, CDC says amid outbreaks in cows USA TODAYH5N1 infects second farm worker in California as feds bolster vaccine supply University of Minnesota Twin CitiesCalifornia reports bird flu in two people in contact with infected cows Reuters