They're counting the infections they happen to log... so ppl who go to hospitals, doctors etc. If you feel sick and think you have the flu, not sure if Covid or seasonal flu, you can report to work and pass your flu to everyone, or call in sick and stay in bed until you feel better. If you're curious whether its flu or Covid, you can buy a RAT to check or you can just sleep in. There's no website or phone line to call available just for ppl to report that they're positive.Singapore is still counting properly and has about 3000.
The Health Minister wanted to stop tracking and publishing full-on infection stats last year, asked a couple of experts if it is a good idea and they said yes because not meaningful at all and so they stopped...