COVID-19: Parliamentary Brief
By James Ferguson James Gilray imagines what would have happened to MPs if Napoleon had successfully invaded Britain: "We come to recover your lost liberties." They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safetyBenjamin Franklin Whilst my note on the false positive rate (FPR) made its way into the corridors of power, the Health Department’s response was at once dismissive but innumerate. Fortunately, not all parliamentarians are so easily fobbed off and one has asked me to prepare a brief, which is why the following is not in the usual format. It appears that the number of amplification cycles used in PCR tests, whether there is any quality control, the false positive rate (for both Pillar 1 and Pillar 2) and the incidence of the disease are all state secrets. However, what is clear is that none of those wielding the controls understand the maths. Both Secretary of State, Matt Hancock (who says the FPR is “under 1%”) and Baroness Harding’s chief medical advisor, Dr Susan Hopkins (definitely less than 1-in-100 and more likely 1-in-1000) believe the FPR is so low as to result in what Hancock calls a “very small proportion of false positives”. In fact, even a FPR as fancifully low as 0.1% (and there is a mass of ...