And since when has a mutation been worse than the original?
Stop asking questions. You're supposed to stay afraid.

The delta mutation does have a documented ability to break through the Mrna vaccines. My spouse is a teacher two of her students are quarantined and the whole classroom is as well. Due to one of those students parents being not only positive for covid 19 delta V but also symptomatic. The other spouse tested negative the children get their results tomorrow. Both parents had both doses of the Mrna vaccines and are weeks past the 14 day minimum from the second doses. Now we all have to be tested before returning to the school or contact with any children. The delta variant is nasty it has a much higher RT0 number and as is evident in this case the ability to infect and also sicken a fully vaccinated person. Who is not old or immune compromised the sick parent is a woman in her mid thirties in good physical condition.