Harris set to make history tonight with nomination for VP; W.H.O. official to young people: you’re not “invincible” to virus; NY Gov. wants schools to reexamine opening plans; NYT: FDA halts blood plasma authorization over weak data; Experts: pooled testing is not being used widely in the U.S.; U.S. Army discontinued testing on unproven therapeutic; Aides: Harris wants “people to see themselves in her speech”; Republican primary candidate target of fake texts, Youtube video falsely claiming he dropped out; Lingering health effects of coronavirus begin to emerge