| swine flu | 4 |
| bird flu | 1 |
| seasonal flu | 1 |
| spanish flu | 1 |
| our area | 0.16 |
| affect respiratory syst… | 0.52 |
| circulate in the commun… | 0.51 |
| get a flu shot | 0.50 |
| appear in early spring | 0.50 |
| peak in february | 0.48 |
| cause serious illness | 0.47 |
| cause severe illness | 0.44 |
| peak in january | 0.44 |
| affect the elderly | 0.43 |
| spread in respiratory d… | 0.42 |
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| headache | 0.56 |
| chill | 0.52 |
| sore throat | 0.52 |
| high fever | 0.49 |
| muscle aches | 0.49 |
| runny nose | 0.48 |
| body aches | 0.47 |
| tiredness | 0.44 |
| mild | 0.44 |
| diarrhea | 0.41 |
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| similar symptoms | 0.44 |
| sudden onset | 0.42 |
| serious and devastating… | 0.25 |
| eucalyptus | 0.25 |
| myrrh | 0.25 |
| a domino effect | 0.22 |
| hospitalization | 0.21 |
| medical attention | 0.16 |
| serious | 0.73 |
| contagious | 0.72 |
| preventable | 0.56 |
| unpleasant | 0.55 |
| seasonal | 0.54 |
| more severe | 0.52 |
| worse than the common c… | 0.52 |
| dangerous | 0.52 |
| mild | 0.50 |
| severe | 0.48 |
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| pneumonia | 0.54 |
| death | 0.53 |
| serious complications | 0.50 |
| bacterial infections | 0.48 |
| hospitalization | 0.48 |
| bronchitis | 0.41 |
| complication | 0.38 |
| sinus infections | 0.37 |
| infection | 0.34 |
| ear | 0.34 |
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| virus | 0.51 |
| caused a or b viruses | 0.42 |
| influenza | 0.41 |
| contagious virus | 0.41 |
| respiratory virus | 0.32 |
| relentless and possibly… | 0.16 |
| communicable disease | 0.16 |
| caused by virus | 0.70 |
| caused by the influenza… | 0.68 |
| prevented | 0.55 |
| spread by droplet | 0.50 |
| treated at home | 0.49 |
| spread by cough | 0.46 |
| spread through the air | 0.46 |
| accompanied by fatigue | 0.44 |
| caused by different vir… | 0.44 |
| treated with bed rest | 0.44 |
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