There are 2 variants of this virus-S and L. L is more lethal. S is milder. S is the ancestor ie original new virus.
Possibly an explanation.
I wonder which strain these folks spread?
How an Upscale Connecticut Party Became a Coronavirus ‘Super Spreader’
About 50 guests gathered on March 5 at a home in the stately suburb of Westport, Conn., to toast the hostess on her 40th birthday and greet old friends, including one visiting from South Africa..
...The partygoers — more than half of whom are now infected — left that evening for Johannesburg, New York City and other parts of Connecticut and the United States, all seeding infections on the way...
Westport, a town of 28,000 on the Long Island Sound, did not have a single known case of the coronavirus on the day of the party. It had 85 on Monday, up more than 40-fold in 11 days.