Ivermectin, page-3

I am a user also
But to stir the pot -- it could be that heavy smokers tend to stay indoors and non smokers are the sporting outgoing type

Just be careful with statistics

Do you have a break from usesage /
the manufacturers testing showed an effective life of 60 days

It also depends on your size of dosaage
Early on a Canadian elderly care home did 3 mg per day non stop as a preventative and had excellent results