[Jason]

Hi Jo,

I hope your brother is okay. I wouldn't be too hard on yourself, i personally dont believe its contagious from human to human. Maybe if it was your husband or baby it could be transferred via bodily fluids.

I think it is spread by a vector so maybe you guys have been to similar areas and bitten by the similar insects. What sort of symptoms is he getting?

At least he has a bright smart sister to take care of him, with your help and knowledge now he won't probably experience the worst of this.