Pneumonia is an infection that affects the lungs and can make breathing feel harder than usual. It may start after a cold, flu, COVID-19 or another respiratory infection, but it can also appear more suddenly. Some people recover at home with the right treatment and rest, while others need urgent care, especially babies, older adults and people with chronic medical conditions. Knowing the symptoms and warning signs can help you act early and prevent complications. On this page What is pneumonia? Common symptoms to watch for Who is more at risk? How pneumonia is diagnosed Treatment and recovery How to reduce your risk When to seek help What is pneumonia? An infection inside the lungs Pneumonia happens when infection causes inflammation in the air sacs of the lungs. These air sacs can fill with fluid or pus, which makes it harder for oxygen to move into the blood...

  Sepsis can start from something that looks “ordinary” - a chest infection, a urinary tract infection, a skin wound, even a stomach bug. The danger is not the infection itself, but the way the body can sometimes overreact to it. In sepsis, the immune response becomes dysregulated and can begin to damage the body’s own organs. This is why sepsis is treated as a medical emergency: it can worsen quickly, and early treatment truly can be life-saving. What is sepsis? Normally, your immune system fights infection and then settles down. With sepsis, that “fight response” becomes intense and widespread. Blood flow and oxygen delivery to vital organs can be affected, and the body can begin to show signs of organ strain - such as confusion, very fast breathing, or passing little to no urine. The most important takeaway is this: sepsis is time-critical, and it’s always better to be checked early than to wait and hope it passes. The red-flag signs you should treat as urgent If an ad...