So, H1N1 is officially a national emergency, and vaccine production is not where it should be. Count as unworried Bill Maher, who, on his show last week told a flabbergasted Bill Frist that people should not take the vaccine because it is net harmful. In fact, the questioning of the scientific establishment by what I'll call populist lay "science" seems to be an, er, epidemic. (Examples include the linkage of other vaccines to autism and most notably the denial of global warming and evolution.) What is the proper role of the lay person when it comes to science?
In my opinion, it's one of complete deferral on scientific matters. However, the laity has an important part to play with respect to evaluating the social impacts of science. This part is especially important when enthusiasm might lead scientists to sweep larger social considerations under the rug. For example, lay worries about the potential moral pitfalls of human gene therapy strike me as valid and legitimate. I also think it's appropriate for laypersons to weigh in on economic considerations relating to science, particularly if it's government science we're talking about. Most of us would consider cost-benefit objections to, for example, a manned mission to Mars, to be legitimate (regardless of whether they're right or wrong). We should also criticize and question scientists if claims they offer are scientific really aren't. A great example of this is overutilization in the health care system; it is legitimate to worry that the amount of care prescribed by a physician is motivated by profit rather than expertise.
But the fact of the matter is most of us don't have enough expertise to evaluate the actual science of vaccines (less so global warming, and less less so evolution). In fact, it seems that the lay questioning of these theories can often be traced to some other ideological commitment - skepticism (bordering on paranoia) of the drug establishment on Maher's part or Christian doctrine on the part of evolution doubters.
I suppose I am granting scientists almost priest-like status. Bad when that's combined with the fact that the scientific establishment has, in the past, believed things that are just plumb crazy. But the operative word is "almost." Science contains within it the self-limiting safety valves of verifiability and falsifiability, unlike religion. Science is prepared to be wrong.