hi well come to hcm
For that you have find out wheather the
disease is air born,water or food born or
through
blood.For prevention-prior to contact if vaccines are awailable you should
get vaccinated Other wise already in contacta means you are already exposed-in
that you may take genrral measures like application of mask,keeping utensils seperate,
drinking boiiled water etc depending on media of spread. THANKS