Emeritus Professor of Medicine,
Genomic & Structural Information
Laboratory (UMR 7256)
Mediterranean Institute of Microbiology
(FR 3479), Marseille, France
Member of the board of directors of the French society of virology until March 30, 2020
In the controversy surrounding the usefulness of wearing a mask to stem the CoViD-19 epidemic, it is very irritating to see the “experts” and the medical world base their discourse only on the capacity of FILTRATION of the masks (“FFP2”, surgical, etc.). The SARS-CoV-2 “particle” (the virus) is a sphere with an approximate diameter of 125 nanometers, i.e.
0.125 micron. It is obvious that the manufacture of masks impermeable to objects that small (10 times smaller [...]