Breakthrough cases in Congress, White House among vaccinated

Per this report a number of vaccinated Congresspeople and staff, and some vaccinated White House staff, have contracted the virus recently. As Delta makes up more than 83% of new cases now it is assumed that Delta was among the aforementioned. Delta is highly contagious but the report does not note whether those breakthrough cases among the vaccinated were also highly contagious. Again it must be assumed that at least some of them are. 

Given these facts it should be advised that even the vaccinated continue to wear masks indoors in public places to protect not only themselves but others. Anything less is being naive and irresponsible. You know, the qualities of typical, self-involved Americans.