The problem is right in front of your face. Check..

3 yrs

The problem is right in front of your face. Check out this great article. Make sure you at least read the 3rd paragraph to find out who the Author is.
https://www.nih.gov/news-event....s/news-releases/bact

Bacterial Pneumonia Caused Most Deaths in 1918 Influenza Pandemic, August 19, 2008 News Release - National Institutes of Health (NIH)

Implications for Future Pandemic Planning