Either are infected or should

It's not correct and it really doesn't make sense - not to me anyway.

Mosquitoes live on human blood. This is how humans are infected by malaria. You should not scratch mosquito bites.

CJ

In a parasitic relationship only the parasite gains a benefit. So, I've tried to connect two ideas.

Mosquitoes live on humans blood, but in turn humans don't gain a benefit form this relationship, because either they get infected by malaria , or have to itch mosquito bites.

I don't know how to convey these two points.

Thank you so much for your reply.

Is it really an either-or situation? What about those who scratch the bites and are infected by malaria as well?

(It's 'scratch the bites', by the way, not 'itch them'.)

That aside, what you wrote the second time is pretty close to what you need. The two possible results should be expressed in a more parallel fashion, and I would put the more dramatic and serious result at the

CalifJimThat aside, what you have wrote the second time is pretty close to what you need.CJ

Hi,

CJ, I think you need to have a break at once!

Thank you so much CJ for rectifying my sentece.

Regardswhat you have wrote

Arrgghh! This was one of those cut-and-paste operations that went bad.

Fixed.

CJ