have to agree with secretmethod on here..
although I am not really sure why you have so many responses to your question that basically told you, "I know you want to do it this way, but it is <b>better</b> this way." although after hearing about your wife's condition I am glad you take precautions.
I must say I think I liked the flu season ones myself
i usually feel awkward (spelling?) whenever shaking a girls hand... reason, I never know if the girl wants to a) shake hands, b) hug, c) don't touch me, or I will mace your ass..
so, i usually wait till the person gives me a signal.. if i see others giving her hugs or she comes up for one, she gets that, handshake if she starts to extend her hand, and nothing if i dont notice anything