According to Wikipedia, 99.5 isn't a fever.
http://en.wikipedia.org/wiki/Fever
> characterized by an elevation of body temperature above the normal range of 36.5–37.5 °C (97.7–99.5 °F)
http://en.wikipedia.org/wiki/Fever
> characterized by an elevation of body temperature above the normal range of 36.5–37.5 °C (97.7–99.5 °F)
It seems to me that if we're dealing with an unusually high-risk situation, it's better to err on the side of caution, no?
Also note even the professional WelchAllyn units are not 100% accurate, they're rated for 0.2 F plus or minus (I bought one not long ago after my old el-cheapo BD one died and Amazon reviews revealed today's el-cheapo ones are by and large worthless. Heck, 3M even created a new consumer brand, no doubt to avoid brand damage to BD).