GUYZ ITS IBRAHIM AGAIN.IN MY PREVIOUS VIDEO WE  LEARNT ABOUT VIRUS AND ITS CHARACTERISTICS.NOW LETS TALK ABOUT DISEASES THESE RONALDOS CAUSEVIRUS IS LIKE GENE WITH NO CELL OF ITS OWN. IT DICTATES HOST CELL TO PRODUCE MORE OF ITS KIND. THE ACT OF ENTERING THE HOST AND STIMULATING IT FOR ITS OWN BENEFIT ON THE COST OF HOST IS CALLED INFECTION.THE TIME PERIOD BETWEEN THE VIRUS INFECTION AND OCCURING OF SYMPTOMS OF DISEASE CAUSED BY IT IS CALLED INCUBATION PERIOD. LETS TALK ABOUT SOME COMMON VIRAL DISEASES.