Well, I would not classify Code of Honor as being necessarily sexist or racist, and further argue that to do so is to impose our own cultural norms on another culture (which is racist, and is something that repeatedly gets the U.S. and Western Europe in trouble today). About the only thing I see as racist about the episode itself is that the Ligonians happen to look, sound, and act like some stereotypical primitive African tribe.
On the other hand, it also seems rather implausible: that the only known source of a vaccine to stop an epidemic would be a planet where the mere act of contacting the society would likely violate the Prime Directive. After all, vaccines are, by definition, made from either the pathogen that causes the disease, or (e.g., smallpox vaccine from cowpox) from a closely related pathogen.
As to voting, I still abstain (courteously).
On the other hand, it also seems rather implausible: that the only known source of a vaccine to stop an epidemic would be a planet where the mere act of contacting the society would likely violate the Prime Directive. After all, vaccines are, by definition, made from either the pathogen that causes the disease, or (e.g., smallpox vaccine from cowpox) from a closely related pathogen.
As to voting, I still abstain (courteously).