Scientists genetically engineered the animals to give them an immune system that's part human,SO AS TO PRODUCE DISEASE-FIGHTING HUMAN ANTIBODIES TO COVID-19 WHICH ARE THEN TURNED INTO DRUGS TO ATTACK CORONA VIRUS

These aren't just any cows. Scientists genetically engineered the animals to give them an immune system that's part human. That way, the animals produce disease-fighting human antibodies to Covid-19, which are then turned into a drug to attack the virus.