Pogue Mahone
Closet Gooner.
In the UK we have hospital and similar stats plus the ONS random sample that tests people from all over the country. A lot less tests done (and even fewer results recorded) than before but still enough to get a statistically valid picture of what's happening.
Importantly, a good percentage of those positive tests then get processed further to look at the specific variants that are currently circulating. From that, you can see how some variants start to contribute more of the cases over time.
In England one of the worrying things is how many people are catching it in hospital. Routine testing in hospital has stopped. And now, Covid's symptoms are mild in most people, so the test doesn't happen. So it's only when someone who is is more vulnerable (or unlucky) catches it and starts showing more serious symptoms that it gets noticed.
I read a Twitter thread from someone who’s involved in tracking all the variants and there’s already been a load of new ones since omicron. However the mutations are constantly trending towards being either less contagious and/or less virulent. So all the signals are we should be able to stop worrying about this stupid virus in the very near future. The latest tweaked vaccines should be the nail in its coffin.