The mouth, lips, and skin are affected due to the infection of:

Explanation

Herpesviruses are DNA viruses that cause lifelong latent infections, commonly producing oral and genital herpes with painful vesicles, cold sores, and sometimes encephalitis. Poxviruses are large DNA viruses responsible for diseases like smallpox and molluscum contagiosum, characterized by fever, rash, and skin nodules. Paramyxoviruses are RNA viruses that cause measles, mumps, and respiratory infections, presenting with fever, cough, conjunctivitis, Koplik spots, parotid swelling, and pneumonia. Adenoviruses are DNA viruses that often affect the respiratory tract, eyes, and gut, leading to pharyngitis, conjunctivitis, gastroenteritis, and flu-like illness.