They are only testing people who have been admitted to hospital - and not always even then. People with symptoms are just being told to self-isolate. They are NOT being tested. How do we know whether they have or have had it or not? South Korea testing 22,000 people a day. Even NHS staff with symptoms are saying they are not being tested. This is a HUGE mistake.
It doesn't help that currently there is no test that shows if someone has had Covid19 and got over it, so without having had a positive test for the virus will mean everyone else is theoretically still susceptible to catching the virus when this clearly will not be the case