The bodies second line of defense is its immune system (remember, the first line of defense is the skin) The immune system includes white blood cells, etc etc...... It takes affect when a virus or germ enters the body.. basically any 'foreign cell'..... and the immune system would respond and kill it
Answer:
The valves actually make things a lot more comfortable because they make the mask a lot more breathable
Explanation:
Ruunig and it is this becasue it makes your muscles retrct over and over agin
Laissez-faire.
It’s weak and basically has no leadership
