Coronavirus live updates: South Korea closes most schools in Seoul area; first confirmed case of reinfection

South Korea ordered most schools in capital Seoul and its surrounding regions to shut due to a resurgence in coronavirus cases.

Scientists are expressing some doubts about the Food and Drug Administration’s emergency use authorization for convalescent plasma as a treatment for Covid-19 patients. In a Sunday news briefing, President Donald Trump touted the treatment as a “breakthrough.” Former FDA chief Dr. Scott Gottlieb told CNBC that while there was enough data to justify the authorization, the treatment is not a “home run.”

Here were some of the biggest developments Monday:

The following data was compiled by Johns Hopkins University:

• Global cases: More than 23.4 million
• Global deaths: At least 809,300
• Countries with the most cases: United States (more than 5.7 million); Brazil (more than 3.6 million); India (more than 3.1 million); Russia (at least 959,016) and South Africa (at least 611,450)