A maddening cow disease

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Yes, those are mini cows bursting out of people. The tub says "Opening Mixture."

The people are panicking but not attacking anyone. Do they know they'll eventually be okay or have their violent reactions been suppressed?

The people in brown, green and blue seem exceedingly calm. They obviously know what's going on but also seem certain the cow people won't attack them. Why?

Are they creating the cow people or curing them? What do they intend to do with these cow people or what caused them to become like this?

What will they do with all the mini cows?