Author: Pr Renaud

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Hands up! What are the gloves for?

Hands up! What are the gloves for?

     By François NR Renaud, scientific adviser Gloves, whose origin goes back to antiquity, are elements of hand protection; handling (against abrasion), protection against heat or cold (firefighters, metallurgists, welders), protection against chemical or biological products (chemical industry, laboratories), against CBRN threats, against cuts (butchers). They are therefore personal protective equipment (PPE). As far as…

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Legionella: importance of aerosols, biological weapon?

Legionella: importance of aerosols, biological weapon?

A short history In Philadelphia, during the 58th American Legion Convention, scheduled for July 21-24, 1976, the Bellevue-Stratford Hotel welcomed the 182 participants. The hotel is a bit “old-fashioned” and the air-conditioning system needs to be repaired. A young 26 year old employee is in charge of controlling it but he falls ill (headaches, aches…

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Ammonium nitrate

Ammonium nitrate

By François NR RENAUD, honorary professor The explosion in the port of Beirut, on August 4, 2020, of 2,750 tons of ammonium nitrate, which destroyed a large part of the Lebanese capital, invites us to remember the usefulness of this product but also its drawbacks and in particular its explosive aspect. History The spectre of…

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Vaccines against covid-19

Vaccines against covid-19

Prof. François NR Renaud, Scientific Advisor The Covid-19 outbreak brings us into the mysterious world of vaccines. It has to be said that an effective vaccine against the Sars-Cov-2 virus would be of great use in the fight against the new coronavirus. By the way: What is a vaccine? An “antigen” or, better yet, an…

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Standards and efficiency of masks: it’s all a question of size !

Standards and efficiency of masks: it’s all a question of size !

What’s this about? We have talked several times about the effectiveness of masks in protecting against Covid-19. These include type 1 or 2 surgical masks, FFP1, FFP2 and FFP3, FMP1, FMP2 and FMP3 and alternative category 1 or 2 masks! All the more so since these masks meet different standards whose criteria do not always…

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The history of medical masks: why did we switch from reusable to disposable masks? Was it the right choice?

The history of medical masks: why did we switch from reusable to disposable masks? Was it the right choice?

What’s this all about? The pandemic at Covid-19 seems to be going away. For us scientists, it has revealed a very large number of lessons: how to deal with such an emerging virus? what pathogenicity? (small gripette or very serious disease?) ; what treatment (hydroxychloroquine, paparacetamol, remdesivir?); reliability of the viral diagnostic test (30% false…

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How to measure the real efficiency of a respiratory protection mask?

How to measure the real efficiency of a respiratory protection mask?

What’s this all about? We have already talked in this blog about the different masks filtering aerosols. In this period of so-called “deconfinement”, masks are more and more in demand. It is now well understood that the wearing of masks by caregivers, professionals in contact with the public or people moving around in the street…

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