Which of the following is the best treatment for a virus?
disinfectant
vaccine
antibiotic
none of the above

The best treatment for a virus is vaccine, that would be your best answer here.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Keeps you from getting lung cancer from smoking