Which action can prevent or stop the spread of communicable diseases? receiving vaccinations spending time with younger people avoiding doctors’ offices even when needed staying in large crowds of people who appear healthy

Receiving vaccinations is my best guess

The correct answer is- Receiving vaccination

Explanation:

Vaccine is a substance which is prepared by pathogenic antigens that can cause communicable disease. The pathogenic abilities of the antigen during vaccine making are destroyed but when they are injected in the body they elicit an immune response.  

Vaccination is given to provide an active acquired immunity mostly against communicable disease to the individual who is getting vaccinated. When the vaccine is injected in the body it initiates an immune response against it which generates memory cell against that pathogen.  

So when that pathogen enters the body in the future then the body adaptive immune response identifies that pathogen quickly and destroys it thereby protecting the body from that communicable disease.