[RajniSahni]

Thanks Sir. I had gone through the literature available, but my confusion was over some intriguing facts:
a) How can a blade cut at a barber cause AIDS (under those rare combination of events: first a cut on an AIDS patient, then on a healthy one), when the titer of the virus isn't expected to be high on blade surface??
b) AIDS is a particle, then why does it require a host as an obligation?? It should very well be dormant.?
c) And even though channels are different for saliva injection and blood sucking, the proboscis of mosquito is common. Isn't it like using the same needle for injections?

My questions might sound stupid, but these questions really strike my mind a lot and I find no proper answer anywhere.

Thanks for your response though.