For the second half of the 19th century and the early part of the 20th, pneumonia was a leading cause of death that killed hundreds of thousands of people. Sir William Osler – usually considered the ...

Linda Yancey, MD, is a board-certified physician in infectious disease and internal medicine with over two decades of experience practicing in Texas. She completed her residency at Mayo Clinic in ...

Pneumonia infects millions of people every year. Cases of this highly contagious lung infection surged across all age groups in 2024, but young children were hit particularly hard. Infection rates in ...

Medically reviewed by Jenny Sweigard, MD Key Takeaways Pneumonia is caused by bacteria, viruses, fungi, or inhaling foreign ...