It's good that you are conscious about your health and communicable diseases. I want to tell you that by massage
disease like HIV
can not communicate. The factors which helps in communication are:
1. Blood transfusion
or any contact of infected blood with your blood
2. Sexual Intercourse
3. Use of Infected needle
4. Pregnant women too child
Except the above factor touching or having meal with infected person can not cause these diseases.
Hope you understand and relax your mind.