years ago ok 45 ish years ago we used to have them come around the school using a spray bit like the ones used for plants spraying i presume disinfectant about the classroom?
i am not saying it would have helped the virus stop in its tracks but surely it must have done some good? i was told they used to do it in cinemas too
it is proved these days now they dont have nit nurses as we called them more children have head lice and due to the cost of the treatment some families just cannot afford the treatment whereas they used to give the lotion for free