Corona patient. Covid positive again.

One month back my mom and dad got covid positive...they both went to NRI hospital near Mangalagiri and treated...my mom (age 56)expired due to breathlessness problem and my dad discharged healthy... ...I have a 1 year old kid so that I can't attend the grave funeral of my mom...but now after one month I want to go my home to meet my dad...is there any chance now he get back covid positive again ...and if my dad will take my kid to pamper him ...is there any chance to get my kid also got covid positive...some one are threating me that if my dad took my son or even he pamper or kiss him then my kid also get covid positive...is it real or fake...??? please suggest me the right way and precautions to take when I meet my dad.from now I want to live with my dad.. so.how can I take precautions that my kid will not effected by covid or even my dad also not to get covid positive again...my dad got open heart surgery in 2014 and he has diabetics and sometimes he has the problem of nose blocking