Greetings friend @carlir, the COVID-19 pandemic, despite all the efforts made by each of the countries in the search for the perfect vaccine, but it is a virus that every day is mutating into different variants, the one you mention the Delta variant, according to studies is proven to be highly contagious, so we must increase biosecurity measures, and prevent further spread.
Hi @chucho27, very true this delta variant is highly contagious and deadly because it does not lodge in the throat but passes directly to the lungs, making the patient unable to recover.