The drug can be laced and made poorly. You never know what is put inside of it because it is not a law in the U.S. to tell your buyer what is put inside of it unless they ask. Also sellers of ecstasy usually are not selling what they tell you. Most of the time they are selling you MDMA.
Cake flour is more refined, it's particles are smaller. We are talking about white flour not whole wheat flour.
Answer:
the second to last one which is hanging out with different people
Virus's are very small and are not affected by antibiotics.