Everyone is immune to different things due to the way in which our immune systems work and develop. When your body experiences something ‘alien’ to itself such as a virus, it attacks it so defending the body from being harmed by it. Your body remembers this next time it meets the same particular virus and so can send out it’s ‘army’ of protective cells quicker than last time and defend the body. This is known as immunity. However, if the virus has changed (mutated or evolved) which some viruses such as the common cold are very good at doing, you will not be immune to it.
Some people have conditions know as autoimmune diseases where their body thinks some parts of their own body are ‘alien’ and so attack them by mistake. Luckily these conditions can usually be treated.
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Everyone is immune to different things due to the way in which our immune systems work and develop. When your body experiences something ‘alien’ to itself such as a virus, it attacks it so defending the body from being harmed by it. Your body remembers this next time it meets the same particular virus and so can send out it’s ‘army’ of protective cells quicker than last time and defend the body. This is known as immunity. However, if the virus has changed (mutated or evolved) which some viruses such as the common cold are very good at doing, you will not be immune to it.
Some people have conditions know as autoimmune diseases where their body thinks some parts of their own body are ‘alien’ and so attack them by mistake. Luckily these conditions can usually be treated.