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