[ashlycat]

you can't vaccine ur cat when they sick, that's will kill them
you could bring them go to vet togetter, will charge 1 time consultation fees, not so expensive
if you don't want to bring them to vet, and guess not a serious sickness, you could do it yourself

1) feed them only cat food for kitten, not adult food to kitten
2) frontline spray -RM38, must spray whole body
3a) TROY deworm syrup R28-RM35 ( different pet shop, has different price)
or
3b) DRONTAL deworm tablets (RM5-RM8 each)
1 kg--1/4 tablets, 1kg-2kg--1/2 tablets
4) anti-diarrhea