Skin
The epidermis is body's first defence against disease and infection. If the epidermis is completely destroyed, the body is more susceptible to bacteria.
Fruit is the main defense against viruses because it gives you nutrients
Mycelium
Dermatologic fungal infections are usually described by their location on the body
Our own immune defence makes the body sick while reacting against germs. Germs themselves have only minor contribution to the feeling of sickness.
A microorganism that can cause fungal infections can enter the body through means such as inhalation and broken skin.
This may or may not be what you had in mind, but the first line of defense is the skin, which keeps out pathogenic organisms. Then there is the immune system.
A vaccination is usually a dead virus that has been administered at a specific dosage to trigger the body to produce antibodies. As a result of this production, the body will recognize the same virus in the future and "attack" it and kill it before it can make the body sick. A vaccine contains complete or partial microbes or the toxins they produce. It stimulates the immune system to raise antibodies against the antigens on the disease carrying organisms. A pathogen against which the body has been vaccinated alerts memory cells so causing the immune system to launch an instant defence.
by swiming
If left untreated, a fungal infection on your lower lip could spread to other areas of your body.
The head, the shell of which is the body, legs which allows the scorpion to move, and the the tail and stinger which acts as an attack and defence to poison the enemy. scorpions can usually camouflage to their surrounds, so watch out for them.