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Why if you have had an infectious disease once you are unlikely to get it again?
Wiki User
∙ 9y ago
Through a process called active immunity, your body protects you from reinfection with chickenpox after you have it. Basically, your immune system fights off the virus the first time, and a few of the white blood cells remember the shape of the virus and stay in your blood. Then when you are exposed to the virus again, and it gets past your natural barriers, the white blood cells (memory cells) that remember produce antibodies more quickly to fight it off. In addition, the body produces more white blood cells that can fight the virus. Memory cells release antibodies into the bloodstream.
A vaccination works similarly; you are infected with a very mild form of the virus that allows you to build up an immunity to it.
You might think, "Well why have i gotten a cold more than once or the flu?" It's because there are MILLIONS of different types of colds and flus. Some viruses change and adapt so they can live; therefore your white blood cells do not recognize them when re-exposed. Because the flu or cold can also mutate, you can catch the same one twice but it's a slightly different virus. Because flu and cold viruses change their outer coat frequently, infection from the same stain of virus repeats rarely. RNA viruses changes there outer coats frequently compared to DNA viruses like chickenpox.
Wiki User
∙ 10y ago
Wiki User
∙ 9y agoOnce you have an infectious disease, you get immunity against the same. This immunity protects you from further attack from the same infectious disease.
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Why do AIDS victims die from different kinds of infectious disease rather than from a single AIDS disease?
Because AIDS is an auto-immune disease and your resistance to germs, viruses, and bacteria are lowered. This makes it very easy to catch an infectious disease and once the body's immune system is further compromised by being sick it is relatively easy for the organs to malfunction.
Can pott's disease reoccur again once it is diagnosed?
Diagnosis is just identification of a disease or condition. It is not treatment.
Why do we say that if a person suffers from chickenpox once he is not likely to be by the same disease in future?
Once you have been exposed to that virus, your body has memory cells that will respond very quickly. Actually, you can be attacked again but you will not get the disease again because these memory cells will destroy the virus.
Why do we say that if person suffering from chickenpox once is not likely to be attacked by the same disease in the future?
Once you have been exposed to that virus, your body has memory cells that will respond very quickly. Actually, you can be attacked again but you will not get the disease again because these memory cells will destroy the virus.
Why would you not suffer any symptoms if you are exposed to the infection again?
With SOME diseases (not all of them) once you are exposed to the disease your body develops an immunity to that disease.
How long are you infectious with slap face syndrome?
You're infectious for up to three weeks PRIOR to the rash showing. Once the rash appears, you are no longer infectious.
What if you got the discharge once and missed your period but then got it again?
Could be stress, Very unlikely that you're pregnant. I would get to the doctors to be safe though.
Can you get the flu after having it once?
yes you can but it is very unlikely because your body already knows how to deal with it so even if you do get it again it will go away sooner.
Is white penis hair normal?
im a girl but my cousin is a doctor and he thinks that it COULD be a hormonal imbalance/old ageing or it could be heriditry or a disease..(disease it unlikely but there was once a case such as this) bUT...you should get it checked with doctor whcih would help.:)
If your Yorkie Poos nail got tangled and it cracked from the root can the bleeding stop?
Well once it's healed it can properly stop bleeding. I would consult your vet immediately because this can turn into an infectious disease.
If a person recovers from H1N1 and again gets infected by H1N1 what are the chances of his survival?
Once someone has had a case of swine flu that is confirmed, then they will have lifetime immunity to the disease and not catch it again.
Father in law that has urinated on the floor at least once a day for about 4 weeks and not told any one about it now the whole house smells what would you do and can this make you sick in any?
While the smell is unpleasant, urine is normally sterile and will not make you ill with any infectious disease. Sorry I can't help you with the cleaning question; I hope you'll post again.
