Show me the evidence that the variants have been isolated. If I make any assumption, it is that people lie for their own gain, that other people believe whatever "experts" say because they have no ability to evaluate the information being presented. When presented with contradictory information from equally credentialed "experts", most people will stick with the first information they were exposed to. All these assumptions are confirmed 99.9% of the time, so they are pretty safe. The left wing media generally only push stories that further their narrative, and usually have to twist details to make them fit. When they do tell the truth, it is in such stark contrast to their constant lies, people just ignore it. It's pretty fascinating, really.