Airborne is the #1 way it is spread along with contact. If an infected individual coughs into their hand and touches something and then you touch it.....but by domeone coughing without covering their mouth can send infected particles into the air and can be ingested by another individual. These particles can be sent several feet away when an individual coughs without covering their mouth.
Respiratory syncytial virus is spread through close contact with an infected person.
Oxygen
mucous membranes of the respiratory tract
washing hands
mostly other pathogens kill pathogens
Respiratory droplets.
The respiratory system; the lungs.
Macrophages
Diffusion take place in these systems.
The respiratory system has a number of nonspecific defenses against disease. The hairs of the nose trap dust and pathogens. Mucus in the upper and lower respiratory system traps foreign bodies and pathogens. The cilia constantly move the mucus with this trapped material out of the system. The cough and sneeze reflexes also offer protection.
Air contamination working hard
It contains pathogens which can spread disease.
yup