Science Source Researcher/Photo Researchers Inc

Some readers' comments:

"...Few human accomplishments have gone farther than vaccination programs in their ability to reduce human suffering and death."

"As a global question, I believe that the benefits of vaccines IN GENERAL far outweigh the risks. But there are specific vaccines that may have high risks for certain people with only marginal benefit."

This issue's Opinion (p. 8) and a recent Editorial (17 [22]:6, Nov 17) discuss vaccine development and safety; 139 readers responded to this survey.

- Alexander Grimwade

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