The US doesn't seem to have nearly enough yet.
If they locked down the whole country for a year - perhaps.
Hubei Province was locked down for about two months.
If you find a island of infection, you lock down that island. The average g ap between infection and visible symptoms is about five days and if you can social distance vigorously enough that you don't need all that many five d ay intervals for the outbreak to go away completely.
John Larkin lacks the wit to understand what's going, let alone what is bei ng said about it. If he can't understand what is being said, he thinks that the comments are "hysterical". It justifies his incomprehension, but it is n't actually correct.
This is mindless optimism. The disease hasn't killed anybody younger than n ine yet, but it does kill some healthy young adults, and the death rate ris es as you get older. It has been claimed to be around 10% for 70- to 80-yea r-olds risng to 15% for people older than 80.