UNC Chapel Hill moves classes online after 130 students test positive for COVID-19; Schools at all levels battling COVID-19; Cases in U.S. declining as average deaths remain at 1,000+ per day; NYT: Researchers say herd immunity threshold could be 50%; Testing Czar: Saliva test used by NBA could be a “game changer”; Researchers struggling to recruit minorities for vaccine clinical trials; Study: Flu & other viruses may spread in dust; 7 sick passengers infect others on flight; CNN Poll: 42% of Americans not confident votes will be cast and counted accurately; Majority of Americans worry voting will be too difficult this fall in new CNN polling; CNN Poll: 53% of Biden supporters want to vote by mail while 66% of Trump supporters want to vote in person; Jill Biden to address convention from school where she taught; Source: Bill Clinton to deliver sharpest rebuke of Trump yet; Trump: Michelle Obama “over her head”, speech was “divisive”; Daughter of Trump supporter: My father died from COVID after trusting the president; Former Trump administration official now backing Biden; Ex-Trump Official: What I witnessed was terrifying; Trump tries to appeal to women with “suburban housewife” trope; Senate Intel Report: Trump Campaign welcomed Russia’s help in 2016; 21 states trending down in weekly COVID cases; New Studies: People may have stronger immune system; Michelle Obama: “Donald Trump is the wrong president for our country”; Wuhan hosts massive water park party as coronavirus concerns recede; New Zealand PM fires back at Trump on new cases; Number of COVID-19 cases in Paris jumps six-fold since beginning of month;