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GBS: Guillain Barré syndrome
| Keyword | Number of Articles in Pubmed |
| Influenza vaccine | 33841 |
| Flu vaccine | 29834 |
| Guillain Barré syndrome | 10205 |
| GBS | 8313 |
| Influenza vaccine & Guillain Barré syndrome | 323 |
| Influenza vaccine & GBS | 126 |
