Coronavirus live updates: NYC setting quarantine checkpoints, J&J producing 100 million vaccine doses for U.S.

The global death toll from the coronavirus pandemic has now surpassed 700,000, with the U.S., Brazil and Mexico leading the world in total deaths, according to data from Johns Hopkins University. On Wall Street, Moderna reported a fivefold increase in its second-quarter revenue related to its work on a potential coronavirus vaccine. The company said it has begun talks with multiple countries to supply its potential vaccine. 

Here are the big developments Wednesday: 

The following data was compiled by Johns Hopkins University:

• Global cases: More than 18.57 million 
• Global deaths: At least 701,455
• U.S. cases: More than 4.77 million 
• U.S. deaths: At least 156,840