Because it feels like a seamless transition. You’re sick with the flu for a few days, and then suddenly, breathing becomes a chore. It’s easy to think the flu just upgraded its weaponry. But that’s like blaming the first raindrop for the entire flood.
The truth is, pneumonia is a separate event that piggybacks on the flu’s destruction. Your immune system is already exhausted from fighting the flu, so pneumonia bacteria sees an open door and walks right in. The flu didn’t become pneumonia; it just made the welcome mat a little too inviting.
This is why your doctor gets so excited (okay, they don’t get excited, but they get serious) about flu shots. A flu vaccine won’t stop every flu strain, but it dramatically lowers your risk of getting so sick that your lungs become a bacterial hotel.
Animal models of polymicrobial pneumonia | DDDT | Dove Medical Press
What Should You Watch For? (The “Is This Bad?” Checklist)
If you have the flu and you start feeling better, then suddenly feel worse—like your fever comes back with a vengeance—that’s a big red flag. Also, if you can’t take a deep breath without feeling like someone is sitting on your chest, call your doctor. Don’t be a hero. Heroes in this story end up on oxygen.
Coughing up green, yellow, or (yikes) rust-colored mucus is another sign. Normal flu mucus is clear or white. It’s like the flu’s note says, “I’m just a harmless cold,” while pneumonia’s note says, “I’m here to redecorate your lungs with inflammation.”
If you have a chronic condition like asthma, heart disease, or diabetes, you’re at higher risk for this awful double-whammy. Same goes if you’re over 65 or under 2. Basically, if your immune system is anything less than a superhero, pneumonia is more likely to RSVP.
