On 20/05/2020 20:40, Simon Mason wrote:
On Wednesday, May 20, 2020 at 8:18:15 PM UTC+1, colwyn wrote:

Q, does the air filtration of your car eliminate virus contamination?

Or Nitrogen and Sulphur oxides and PM10s?
Nifty things these pollen filters - they can trap Nitrogen compound molecules.

More Google:

Tesla and Geely claim that their cars’ HEPA and N95 filters block the
coronavirus, but some experts doubt it. One thing is certain, the
ordinary cabin filter of all other cars does not protect anything.
HEPA certified air filters (for High Efficiency Particulate Air) are
used in ventilation systems in aircraft, hospitals and industry clean
rooms to retain dust, pollen, bacteria, and even certain viruses. It all
depends on their size and the category of filter used.

In October 2015, the American Tesla was the first to apply such a degree
of air filtration to the automobile, equivalent to what the handful of
armouring specialists offer to isolate their wealthy customers from the
consequences of a biological attack. . It is this very particular
activity which inspired Tesla to name his memorable system “defense
against biological attacks” (bioweapon defense mode) introduced on its
Model X SUV. well-known trade name, obviously designed to strike the
imagination and highlight the virtues of electric propulsion, known as
zero emission.

It takes more than a simple filter to stop the coronavirus