Covid-19 case. With heart and kidney)

Today is 28th October, 2020 Please read this scenario: One of my friend had fever and cough symptom from 13/14 th October, so he consulted with local doctor and take medicines. I met with that person on 19th of October, I saw he had some symptom of cough, there after I met with that person one week later, he was sneezing a little. Due to he feel weak many times and some symptoms are there he tested for covid and found positive on 27th October. I met with him on 26 th October. Now on the meeting style: I always wear mask with the meeting and use sanitizer frequently. Meet was no longer than 2-2.5 hours. There was other guys also. Some wear mask and some not. I don't have any symptoms till now but what future precautions I need to take as well as for my father( he has some problem with heart and kidney) Thanks for the reading.