The local Syro-Malabar Church has started a drive to give Communion in the hand based on the fear that a drop of saliva from one person might spread AIDS to another. I think this is pure propaganda and I have never heard of anyone’s catching any disease at Holy Communion. (Note be all kiss the same cross on Good Friday and nobody has ever caught anything). I also doubt if AIDS can be transmitted in this way.
While this link does not address the rules or practices of the Syro-Malabar Catholic Church concerning the dispensing of the Eucharist, it does answer your question about viruses being spread via a shared chalice. If you have any further questions or concerns that are not answered by these links, please contact Catholic Answers directly.
Can drinking the blood of Christ make you sick?
**Eastern Christianity forum