Question

1. can a non - infectious disease be passed to a friend?

no, the disease is not strong enough.
yes, the disease can be passed through saliva transferred through coughing and sneezing.
no, there are no infectious particles.
yes, through transfer of blood.

Explanation:

Non - infectious diseases are not caused by pathogens (infectious particles like bacteria, viruses, etc.). They can be due to genetic factors, lifestyle (e.g., heart disease from poor diet and lack of exercise), environmental factors (e.g., certain types of cancer from exposure to toxins). Since there are no infectious agents (particles) involved in non - infectious diseases, they cannot be transmitted from one person to another through common infectious routes like saliva (coughing/sneezing), blood transfer etc.

Answer:

No, there are no infectious particles.