Here is the full list of all 10 Vaccine trophies - there are 4 bronze, 5 silver and 1 gold.
First casualty
Obtain the rank Rat.
Obtain the rank Bat.
Obtain the rank Spider.
Obtain the rank Snake.
Obtained the rank Wolf.
Obtain the rank Crocodile.
Obtain the rank Shark.
Obtain the rank Undead.
Solve the mystery of the house.