Fix errors in this text: Medical expenses are most likely to be the burden of aged population.
The following are the main causes of the 1911-1912 influenza pandemic:
1. The influenza pandemic of 1918-1919.
2. The influenza pandemic of 1918-1919.
3. The influenza pandemic of 1918-1919.
4. The influenza pandemic of 1918-1919.
5. The influenza pandemic of
The following are the main causes of the 1911-1912 influenza pandemic:
- The influenza pandemic of 1918-1919.
- The 1918 influenza pandemic.
- The 1918 influenza pandemic.
- The 1918 influenza pandemic.
- The 1918 influenza pandemic.
- The 1918 influenza pandemic.
- The 191