Health officials have suggested that the spread of AIDS can be partly contained if more males use condoms. Use the concept of       demand-side externality to comment on (1) whether the number

Health officials have suggested that the spread of AIDS can be partly contained if more males use condoms. Use  the concept of 

demand-side externality to comment on (1) whether the number of condoms sold in the U.S. is more or less than the optimal number, and (2) how 

the government might correct the externality.