s viral load been measured and do you know the result? Or his CD4 lymphocyte count? Even without this information
, is your dad is ill with HIV
? Was he diagnosed because of symptoms, or as a routine screening test? These things can give clues about how infectious his blood might be. Is he part of the household, or was he just visiting your home at the time?
Even without that information, I can assure you there is little or no risk of HIV transmission from the events you have described.