I use Purell a lot, but I get pink eye really easy. I have it all over the house and anytime I touch my son's diaper, even on the outside, I Purell. Since he's been born (he's 2) I've had pink eye about a dozen times. Half of those I was the only one in the house to get it.
And I have some Tamiflu stockpiled. I bought it in February when my husband and son got the flu a week before our ski trip. They got over it in time, but I didn't want to catch it right before or during the trip. I only ended up taking half the pack and kept the rest.