Vinu4141
The short answer is we do, it's just that there are so many different causes to common cold. A slightly longer and more complete answer will note that while we know immunodominate epitopes for the 100s of rhinovirus serotypes, we are still researching why viruses like RSV are not immunogenic (my bet is on NS1, possibly NS2 proteins). .....
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tanishagoyal1
Because cold is a viral disease as it is caused by a virus. virus changes its shape continuously so immunity cant be build.
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