I found Vega it's useless
From Dr Andrew Burnett
Sonning Common, Berkshire
The Vega allergy testing machine mentioned by Dr Church (Letters, 23 February) was shown to be a useless method of diagnosing allergies in a well-designed trial published in 2001 (Lewith GT et al, BMJ 2001;322:131-134).
If something seems too good to be true then it probably is.