Hello! Could you please tell me what to do with my 1.5-year-old child …

Hello! Could you please tell me what to do with my 1.5-year-old child who has been outside five times, including going to and from the taxi, in total. He/She coughed and sneezed for an hour after being out, and now I'm afraid to take him/her outside again. By the way, it gets cold quickly if he/she stays home for a long time, especially when changing diapers, and coughs. Has anyone experienced this? I am a first-time mom and I'm scared.