Just a mad thought, if a contaniment' can skew the test result, why not simply identify it/them and warn people not to partake X hr's before the test. Think I could control my 'burger' urge whilst at the airport
-80! retired after 40+ years in refrigeration design, cannot tell you how difficult this will be, especially mobile units, suspect people will have to travel much much further to get tested.
Think you have wrong there Triphop, started earlier this morning by some cluck I cant remeber his name ( since removed )and MW****r who arrived a little later.