Thank You My Brother Is 51 And He Has 2

thank you my brother is 51 and he has 2 places on his back that resemble spider bites. we are treating with triple antibiotics. I noticed he also has a rash developing which was not there yesterday. he has had this for 7 days only told me yesterday. 2 weeks ago he started coughing after visiting a sister who since has been diagnosed with pneumonia. how can we treat this at home?
no insurance.......I failed to mention he is unemployed so can't pay you for your help.