PCR (Polymerase Chain Reaction): the method used in the presently available Covid-19 tests.
Original video by Jean-François Gariépy on The Public Space:
Trump is Pondering a Date for Return | TPS #729
JF's book: The Revolutionary Phenotype: The amazing story of how life begins and how it ends
JF on YouTube: https://www.youtube.com/channel/UCuoFIyMX7PmlwwdmpXfyeNA
Intro music: OBLIVION OVERTURE by Scott Buckley
Clip suggested by intoleranceisavirtue @intoleranceisa1
This video on BitChute: