I've come to the conclusion that very few people understand how vaccines work. And I don't think you do, either, Pete. People are getting infected by Delta because NO VACCINE PREVENTS INFECTION FROM COVID OR VARIANTS. People are getting sick despite vaccinations because a vaccine cannot stop you from inhaling Covid. All a vaccine does is instruct your immune system that this THING is a threat. The vaccine mimics the actual virus while minimizing the impact on your body so as to put your antibodies on full alert. That way, your immune system will immediately recognize the real thing when it infiltrates your body and mount a defense before your body is overwhelmed. That's the premise. The reason WHY people are still getting sick is because Covid is a nasty replicator, and the body has a hard time keeping up, which is why so many people complain of fatigue while fighting it off. And the reason why it keeps spreading person to person is because even vaccinated people can spread it. The adage," if you can get it, you can spread it," applies. The Delta variant is simply a faster replicator, born of our attempt to limit hosts by masks, etc. Now, what will happen if we don't take steps to eradicate Covid completely and externally, is that it will mutate again. And it's doubtful that it will mutate for the better. That is why we need masks, utra-violet in ventilation systems, social distancing, etc. along with vaccines, which is why the CDC is back on the mask track. Thanks!!