pathogen
A pathogen is a foreign body, bacteria, or virus.
Pathogen.Pathogens can be things like viruses or bacteria which have things called antigens on them. These antigens are proteins on the pathogen that let the body know that the pathogen is potentially dangerous. This induces the immune response.Hope this helps!
Antibodies are used to fight from foreign particles (pathogen generally) entering in the body of an individual.
Antigen
When the body encounters a pathogen and destroys it, memory cells are created. These memory cells "remember" the pathogen, allowing the immune system to respond more quickly and effectively if the same pathogen is encountered in the future.
During the second exposure to a pathogen, the immune system can mount a quicker and more targeted response due to immunological memory. This is because the immune system has already encountered the pathogen before and has memory cells ready to recognize and respond more efficiently to the pathogen. This results in a faster and more effective clearance of the pathogen from the body.
Memory B cells act like an internal vaccine because once it fights the pathogen off it will recognize it. This is how they make vaccines because they inject you with a small amount of the pathogen not enough to harm you so your memory B cells recognize it.
The node will swell
The pathogen tries to infect the body. The defense mechanism of the body resists the entry of the pathogen. If pathogen succeeds the infection is established and the body becomes sick.
If it can be harmful, it can be referred to as pathogen.
introducing a harmless version of the pathogen to the immune system. This allows the immune system to recognize and remember the pathogen, so it can respond quickly if the real pathogen is encountered in the future. Ultimately, vaccinations help prevent illness and the spread of infectious diseases.