The subject, in fighting off their first bout of measles, developed an antibody specifically effective against measles, and becomes able to reproduce this if re-exposed. The infection is then typically killed off before it becomes symptomatic.
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.
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.
We don't have your statements so can't answer your question.
It depends on the specific virus or illness you were exposed to. Symptoms can start to appear as soon as a few days or as long as two weeks after exposure. It's important to monitor your health and seek medical advice if you develop any symptoms.
Symptoms of biological exposure can vary depending on the specific pathogen, but common symptoms may include fever, fatigue, cough, difficulty breathing, diarrhea, vomiting, rash, and body aches. It is important to seek medical attention if you suspect you have been exposed to a harmful biological agent.
i m confused whether all sub-clinical cases result in disease or not just like a case going through incubation period who'll have disease some time in future. Is there any definite difference between these two things.
Waffle
During the incubation period a person is exposed to a disease may not show symptoms
An individual is exposed to a killed pathogen, an inactivated pathogen, or a component of a pathogen. The individual is protected from subsequent exposures to the pathogen because the adaptive immune system is stimulated to produce memory B cells and memory T cells, which protect from subsequent exposures.
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.
A person can become immune to an infectious disease through vaccination, which triggers the body's immune response to produce antibodies against the pathogen. Additionally, a person can also develop natural immunity by recovering from an infection, where the immune system creates memory cells that can recognize and fight the pathogen if re-exposed.
The purpose of introducing weakened microbes or pathogens into the body for vaccination is to stimulate the immune system to recognize and respond to the pathogen without causing disease. This exposure helps the body develop a memory of the pathogen, allowing it to mount a quicker and more effective immune response if exposed to the actual pathogen in the future. This process enhances the body's ability to prevent infections and provides long-lasting immunity against specific diseases.