4th human bird flu case reported in U.S. as Colorado farmworker is infected He works at a dairy farm in northeastern Colorado and had direct exposure to dairy cattle infected with H5N1, a virus that causes bird flu. Read More at Source. Author: Pumilo Share this:TwitterFacebookMoreLinkedInRedditTumblrPinterestPocketTelegramWhatsAppLike this:Like Loading... Related Tags: BirdNews July 3, 2024 by Pumilo Bird News 0