Archive for Robert Dorfman

pooling or not pooling

Posted in Books, Kids, pictures, Statistics, University life with tags , , , , , , , , , , on September 22, 2020 by xi'an

A pro-pooling opinion tribune, followed a few days later, by a collection of opinions on pooling PCR samples to absorb the overload in testing laboratories and produce results in a delay that is short enough for public health impacts.  Le Monde is taking sample pooling most seriously! This includes a link to an April article by Christian Grollier and Olivier Gossner (CREST) published in COVID economics (!), recalling the basics of sample pooling and citing a Technion experiment to show the approach is feasible in practice. With a recommended pool of 80 patients if the prevalence is 2%. And of 30 for a prevalence of 5%. Despite the approach being implemented in other countries, and considerable delays in analysing the PCR samples, the conclusion of the French public health authorities is that it is urgent to wait..!

Dorfman’s group testing

Posted in Books, Kids, Statistics, Travel with tags , , , , , , , , on April 9, 2020 by xi'an

A recent note by CREST researchers insists on using group testing to compensate for the shortage of test packages and testing personal, as done in several countries, towards deconfining individuals who are not infected. Or who are exhibiting the right antibodies.  Reminding me of my first entry to the notion, in Feller’s book, of the method implemented by Robert Dorfman to test for syphilis prior to enlisting potential WW II soldiers. I would deem the idea useful for surveys, in identifying the proportion of infected or immunised persons, maybe less for giving the green light to leave one’s house as the logistics of merging the tests while keeping track of every individual could prove impossible.