Stay Updated on Developing StoriesView in AppBy Kristin Wilson, Daniella Diaz and Betsy Klein, CNN(CNN) A former top Trump appointee urged health officials to adopt a "herd immunity" approach to Covid-19, according to internal emails obtained by the House Oversight Committee and shared with reporters.Former Health and Human Services senior adviser Paul Alexander repeatedly urged his colleagues at HHS and the US Centers for Disease Control and Prevention to pursue a herd immunity strategy amid the Covid-19 pandemic.One example is when he wrote in an email on July 3 that Americans "must go on...…Stay Updated on Developing StoriesView in AppBy Kristin Wilson, Daniella Diaz and Betsy Klein, CNN(CNN) A former top Trump appointee urged health officials to adopt a "herd immunity" approach to Covid-19, according to internal emails obtained by the House Oversight Committee and shared with reporters.Former Health and Human Services senior adviser Paul Alexander repeatedly urged his colleagues at HHS and the US Centers for Disease Control and Prevention to pursue a herd immunity strategy amid the Covid-19 pandemic.One example is when he wrote in an email on July 3 that Americans "must go on...WW…