I can't find a definitive start, but essentially as soon as samples were being tested, it was conspiracy theory time. Even if it's not for DNA, I can assure you

I can't find a definitive start, but essentially as soon as samples were being tested, it was conspiracy theory time. Even if it's not for DNA, I can assure you the swabs have many conspiracy theories behind them. (Credentials: my wife is really into conspiracy theories)