Tuberculosis reproduces through the air and often on contact. It is spread through coughing, mucus, sneezing, and reproduces very quickly.
Yes, contagious diseases are infections. Infections are occur when a pathogen (germ) enters the body and reproduces.
When an organism reproduces quickly, the population increases rapidly. This can lead to competition for resources like food and space, potentially causing overcrowding. In the long term, it can result in environmental degradation and increased vulnerability to disease or predation.
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An Ant
r-strategy
Cockroaches reproduce quickly and have a waterproof exoskeleton that helps them thrive in various environments.
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.
Once the body activated, killer T cells it recognize pathogen and destroy them. In response that will create memory B cells and T cells specific to a certain pathogen, so if it ever came back it will be killed immediately.
Something very bad happens.
A vaccination must contain either a weakened or inactivated form of the disease-causing pathogen, or specific pieces of the pathogen such as proteins or genetic material. This prompts the body's immune system to recognize and remember the pathogen, allowing it to quickly mount a response if the person is exposed to the actual pathogen in the future.
When a pathogen enters the body, it first encounters the body's physical and chemical barriers, primarily the skin and mucous membranes. These barriers provide a first line of defense by preventing the pathogen from entering deeper tissues. If the pathogen breaches these surfaces, it then encounters immune cells and proteins in the innate immune system, which act quickly to identify and combat the invader.