Yes you can be infected with a pathogen but not show any signs or symptoms but you can still pass it on it other people.
We don't have your statements so can't answer your question.
When you are infected with a pathogen for the first time, your immune system has not been previously exposed to it and needs time to recognize and develop a specific response to fight off the invader. This initial lag in immune response allows the pathogen to replicate and cause symptoms of illness before the immune system can mount an effective defense.
An avirulent pathogen is a pathogen that is unable to cause disease in its host. This may be due to mutations that have reduced its ability to infect or harm the host, making it less pathogenic compared to a virulent pathogen.
There are infinitely many things that do not contribute to the virulence of a pathogen. Elvis does not contribute to the virulence of a pathogen.
Pathogen
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.
There are many organisms that cause disease. Bacteria, like H. Pylori that causes stomach ulcers. Of course, rats can cause diseases and they are still organisms, just not single celled. They carry ticks, and their feces isn't good to breath in. Ticks carry diseases, and rats can carry sickness which can spread to humans.
Any living organism can get sick, either by an outside pathogen or by some internal mechanism causing illness.
By inhaling pathogens from a sick person's sneeze or cough
By inhaling pathogens from a sick person's sneeze or cough
A carrier is an organism that harbors and transmits a pathogen without getting sick, while a vector is an organism that transmits a pathogen from one host to another. Carriers may not show symptoms but can pass on the pathogen, whereas vectors are necessary for the pathogen to be transmitted between hosts.
Waffle
Memory cells are a type of immune cell that "remember" an encounter with a specific pathogen. When the same pathogen is encountered again, memory cells mount a faster and more robust immune response, helping to quickly eliminate the pathogen before it can cause a full-blown illness. This quicker and more effective response is what helps prevent a person from getting sick upon subsequent encounters with the same pathogen.
Depends on why they're sick. They can carry and spread viruses and such.
No, cystic fibrosis is a genetic condition. Both parents carry the gene.
Culex is a genus of mosquito. It has been known to carry pathogens for West Nile virus, avian malaria, encephalitis, and other diseases.
We don't have your statements so can't answer your question.