What is the most common organism of the followings:

What is the most common organism of the followings:

  1. Post Viral Pneumonia (S aureus or Strep Pneumo?)

  2. In Children of age 4 week to 18 years?

  3. In Adults of age 40-65 year old?

  4. In immunocompromised (HIV) patient?

  5. In a hospital acquired setting?