My Neighbor Has Been Feeling So Sick. He Has Breakouts

My neighbor has been feeling so sick. He has breakouts on his face that look like acne and upper body breadkouts. These pimple like rash patches are not itchy. Was treated with Bactrim at a local clinic as well as IV . These are not itchy, not painful BUT look awful. He is not covered all over however. They are bright red. Blood tests are not available yet and it has been four days. Physician did not know if it was viral of bacteria.
His co-workers did not have rash put had upset stomachs however. Any ideas?
I want to know if it might be contagious as I did bring over soup and talked with him. I am 75.