The Food and Drug Administration’s decision to give emergency authorization for convalescent plasma as a treatment for novel coronavirus patients — touted as a historic breakthrough by President Trump on Sunday — is raising doubts among some experts who say certain claims of its effectiveness are dubious or wrong.

Here are some significant developments:

  • The U.S. coronavirus death toll has surpassed 173,000, with 5.7 million confirmed cases.
  • Zoom outages disrupted meetings and classes around the United States for about four hours Monday, highlighting Americans’ growing reliance on video software to keep things running during the public health crisis.
  • A new study claims that the case of a Hong Kong man is the “the world’s first documentation” of re-infection and suggests that immunity could last only a few months.
  • Two tropical storms threaten to complicate the coronavirus response along the Gulf Coast. Meanwhile, Northern California residents struggle to safely evacuate as wildfires rage.
  • The renomination of President Trump took place in Charlotte in humbler conditions than the Republican National Committee had planned.
  • A Florida judge Monday granted a temporary injunction against the state’s order requiring school districts to reopen schools during the coronavirus pandemic.
  • Ohio State University suspended 228 students in one of the largest crackdowns on coronavirus violations.