| provide protection | 0.69 |
| prevent the flu | 0.65 |
| reduce the risk | 0.63 |
| protect people | 0.57 |
| cause the flu | 0.54 |
| use egg | 0.49 |
| protect against influen… | 0.48 |
| give the flu | 0.44 |
| prevent death | 0.38 |
| vary | 0.35 |
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| death | 0.20 |
| side effects | 0.16 |
| mercury | 0.50 |
| thimerosal | 0.49 |
| three or four flu virus… | 0.37 |
| formaldehyde | 0.33 |
| same reduced efficacy | 0.28 |
| effective | 0.79 |
| safe | 0.57 |
| free | 0.57 |
| less effective | 0.51 |
| experimental | 0.50 |
| ineffective | 0.49 |
| important | 0.45 |
| dangerous | 0.34 |
| more effective than a p… | 0.33 |
| more effective | 0.33 |
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| 60% effective | 0.49 |
| the best way | 0.47 |
| 10 percent effective | 0.43 |
| trivalent | 0.38 |
| good match | 0.36 |
| 90% effective | 0.25 |
| example | 0.25 |
| 56 percent effective | 0.25 |
| than 50 percent effecti… | 0.25 |
| 25 percent effective | 0.22 |
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| made | 0.70 |
| recommended | 0.67 |
| updated | 0.60 |
| produced in egg | 0.43 |
| made in two ways | 0.42 |
| given by injection | 0.41 |
| given with needle | 0.41 |
| recommended for child | 0.40 |
| given as a nasal spray | 0.37 |
| considered good | 0.37 |
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