47.Which of the following disease is generally caused by viruses? [A] Cholera [B] Typhoid [C] Dengue fever [D] Tuberculosi
Viral Infections Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, Ebola, and COVID-19. Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves.
