Sorry if this is technically off-topic, but somehow this became the "mesira" thread even if it's officially titled otherwise.
If a school is completely disregarding public health rules, and I don't mean little things that nobody's complying with, but a blatant flouting that can actually endanger many families such as by not quarantining classes with confirmed positive symptomatic cases or even bothering to notify the parents, and even going so far as to then mix the exposed class with other (healthy) classes, is there any halachic justification to "innocently" report the cases to the government's Covid hotline that's used for contact tracing purposes, then leaving it to them to connect the dots and deal with the school as they see fit? Or are there any other halachically permissible remedies that may be pursued, as I assume a DOH complaint would be borderline mesirah?