Let me explain basic stats to you dolts. There’s no random testing in India since yield of positive cases is low. sampling method used for Tablighi is the same one used in entire country. It’s called purposive sampling. Stick to silly opinion pieces. Stats is above your pay grade https://twitter.com/dhume/status/1247579435383078912

The sampling bias you talk about is a deliberate and requires phenomenon adopted everywhere. Even in the US, more tests are done in New York and those who exhibit symptoms and among those who came in close contact to COVID positive cases.

In any epidemic/pandemic there will be some high risk groups that are over-represented. Like in HIV, men having sex with men, injection drug users are at higher risk. There are specific strategies adopted for such high risk groups for their own good.

Therefore Tablighi should be thankful that there was aggressive contact tracing. This sampling bias you curse is in fact a blessing. Thanks to this, they have been identified, tested. They can get the care they need and won’t further infect their loved ones.