bakugo was fighting a villain, but then the villain turned bakugo into a vampire he still has his quirk but he needs to tell this to the others. So bakugo went to the dorms of the UA and he explained the situation to the others

Uraraka: so you tuned into a vampire because of a villain and if you don't drink blood you can die?!

Bakugo: yes and now I am hungry, can someone let me drink some of their blood?

Deku: you can drink my blood! You are my friend and I am not going to let you die!