Not to sound like piling onto India, but what is happening there is precisely how rational people answered the question "How are you sure the Chinese government is not covering up mass deaths?".
In a country as large as China, it would be impossible to cover up a mass death situation. As we see in India now, the crematorium would be running non-stop. That is just common sense.
Anyone who is still selling a cover up theory (including the head of Human Rights Watch Ken Roth) is just lacking common sense or a liar.
The easiest response is say: "Chinese and Western foreigners are freely walking around China without face masks, and have not noticed overflowing public hospitals beds, cemeteries, or morgues. They are free to take pictures of any long lines at hospitals or non-stop activity in cemeteries. Has CIA not discovered cameras? "
That shut up some people really quickly. It's all theoretical until the tiniest remotely plausible explanation can shut them up and shove their conspiracy theories up their a$$es.