 [ Symptoms ] flu people are contagious for 5 10 days viral shedding why are children allowed back to school after 24 hr fever free i have heard so many confusing answers cdc says people are shedding the flu virus for 5 10 days after first sign of symptoms would this not make people infected with the flu virus contagious for up to 10 days after fist symptoms does tamiflu reduce viral shedding since it is an antivirus [ Disease ] no that behavior will not change with spaying male dogs who are neutered may should a positive change in behavior or attitude but to my knowledge spaying will not really change this chewing habit be patient these puppy behaviors should improve over time with love and proper discipline incidentally spaying is a good practice if you do not want the mess and annoyance of a dog in heat or a lot of puppies