The risk to human health, to public health, at this stage is minimal.

If they follow these guidelines the risk is basically nonexistent.

This virus is not yet adapted to humans, it is not capable of human-to-human transmission and until that happens this will not be a pandemic strain.

Second hand smoke is just a known health risk.

There is an environmental and health risk that could occur.

It provides an important public health benefit, there's no other OTC alternative to CFC epinephrine inhalers, and the environmental risk from the release of CFCs from Primatene is small and justified given the benefit it provides.