why are we not constantly sick from all of the bacteria around us?

Answer 1

Not all the bacteria is bad, plus if any of the bad bacteria gets in us, the immune system (the white blood cells) will attack them.

Answer 2

This is an interesting question that all but proves the Theory of Evolution! Many people have died in the past from exposure to common bacteria, but the ones with an immunity (chance dictates that there will always be some members of a population with some degree of immunity to almost anything) survived and bred with each other, producing offspring that also have immunity. Typically the only bacteria that pose a significant or serious threat at 'natural' levels are those a population have had no regular exposure to. This is why people get sick when they drink the water on 'exotic' holidays, but all the people that live there are just fine.

Answer 3

Bacteria like us can build immunity's to antibiotics.
Are body has the ability to fight off most bacteria, and build immunity's to virus if we allow it to. We have become so dependent on antibiotic. Anti bacterial soaps, and such.
Our children will have very weak immunities due to this, they are sicker than the over 40 population.
I am 47 I have only had the flu twice in my life (if I judge it by the incapacitation of text-book diagnostic symptoms), both times it was about 14days after receiving a flu shot, once 13 years ago, and the other last year. The first time was a doozy! Last year was not as bad. Those were also the only times I received the flu shot.......after the first time it took me 12 years to be brave enough to receive another. That is what I am judging sickness I felt as the flu.
I have had colds, coughs, respiratory infections.........but.......never ever incapacitated to the point I was unable to move.......I had thought some of those illness might have been "The Flu" compared to those episode they where nothing!
We also live in more crowded area's so bacteria too becomes more populated. Plus we share more public area's such as gym's, hot-tubs, swimming pools, bathrooms, so have greater chances of being infected with bacteria.

Answer 4

Normally we do not get sick from bacteria that are found on our skin, water, soil, etc because our immune system has made antibodies against them. If one of the bacteria say breached the skin and we had been previously exposed to them we would have an immune response using antibodies that had been generated in the primary response and we would not even know we had been exposed. However, if you had a weakened immune system due to HIV, cystic fibrosis or cancer the bacteria that normally don't make you sick could because you have a weakened immune system.

Answer 5

If you worked at a dr's office or hospital, you'd see that people are ALWAYS sick. If you or the people around you don't really get sick, that's a good thing. It means you have a healthy immune system, and it's fighting off all the nasty germs going around.

Answer 6

We develop immunity to common bacteria. There are also helpful bacteria such as e. coli which lives in the human and animal gut. It's only when e. coli gets into places it's not supposed to be, such as the urethra, that it becomes dangerous.

Answer 7

not all bacterias are harmful some are even beneficial and harmless. Also because of our immune system.
That is why people suffering from AIDS are open to bacterial infections because in AIDS immune systems are destroyed.

Answer 8

Immune systems

Answer 9

We probably are always sick. Our immune systems usually protect us from the worst of it though.

Answer 10

becuase our immuine systems get stonger the longer we are around the bacteria, making us less likly to get something we've already had unless the bacteria or viruis gets stronger and then we may get it again!