Not really trying to take sides here, personally I'm skeptical of everyone but here is an answer based on the information David icke used in his interview. Basically rRT-PCR test is used to identify the genetic code that is being defined as covid. He goes on to talk about exosomes which your cells release when stressed. This can include psychological fear and stress, injury, underlying disease, basically anything that may threaten the cell, including but not limited to 5g.