Top 5 viruses Except carona virus

i totally discussed about Top 5 viruses which are effected in the world like rota virus cholera virus ebola virus small pox virus black death virus by these virus number of people where died across the world with out medicine they fighted for long time up to now their is no vaccine for some viruses. Topic is total explanation about viruses. for more videos visit Praveen Galaxy channel.. subscribe and share ,

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