Communicable diseases spread from one person to another. Thus, social distancing can combat the spread of communicable diseases like the flu or coronavirus.
Due to the way terminal velocity caps the maximum speed that something can fall, a small and light object like a penny will never gain enough speed to kill someone regardless from how high it is dropped from.
Scorpion Venom is the most expensive liquid in the world costing up to $39 million a gallon. Like other expensive liquids such as penicillin, insulin, patchouli, human blood, cobra venom, and horseshoe crab blood, scorpion venom has medicinal uses.