There are now 2 strains that are known. The "G" strain is more contagious and is the strain that entered New York. The changes revolve around a "U" nucleotide. I think the "G" is a popular reference and not scientific.
This is a unique strain to the USA, in that, it came from a Seattle student with flu symptoms. This strain contains five mutations that cannot be traced to any other part of the world. Uracil is the scientific name of ONE OF FOUR nucleotides bases. Yes, the human genome is built on 4 bases linked together to form 20 nucleotides of "3 base chains."
uracil (U) (click here)
Five weeks later, (click here) a high school student in Snohomish County, Wash., developed flu-like symptoms. A nose swab revealed he had Covid-19. Scientists sequenced the genome of his coronavirus sample and found it shared the same distinctive mutations found in the first case in Washington, but also bore three additional mutations....
The confirmed cases of COVID-19:
Globally - 10,321,689
USA - 2,573,393
The USA now accounts for more than 24 percent of all confirmed cases.
The Americas have 5,218,590 confirmed cases. The Americas are more than 50 percent of confirmed cases. Of the Americas, the USA is more than 49 percent of the confirmed cases. The USA leads in the number of confirmed cases.
Deaths caused by COVID-19:
Globally - 507,435
USA - 126,573
The USA now accounts for nearly 25 percent of the deaths. The USA leads in the number of deaths.
The USA has FAILED to protect it's people, hence, it's economy. Now, the strategy by the White House is to return the economy regardless of leading the world in cases and deaths, ALLOWING more and more danger to the people and increasing the chances of infection and/or death.