Robin,
We've got millions of people worldwide thinking people are getting tested for covid19 (at these "covid19" test centres) when this is just not the case.
There is no test for covid19.
It's fine when lay people get mixed up between the two (as
@Bruce Stephens said they are used interchangeably), but when medical people, governments and doctors are missunderstanding the fundamental difference and basing entire public awareness campaigns and testing on the wrong terms you have to question what is happening?
There is rarely any mention of the clear distinction between the virus and the disease.
Many people catch sarscov2 but that doesn't automatically mean you will develop covid19, it doesn't necessarily cause covid19.
The pcr tests themselves are hardly much use. They don't tell you if you are infectious, currently have it or had it, they don't tell you if you are ill. They are known to give false positives, even more so when mass testing those with no symptoms, false negatives and as
@Sally71 said, many people have reported getting positve results from all sorts of other substances they have swabbed like drinks, fruit etc