Viruses and COVID19

We talk a lot about viruses at the moment. But by the way, what is a virus? Is COVID19 a crawling little beast that comes insidiously by surprise to infect our lungs?
Thanks to this video, you will get some basic information to understand how viruses work, and also a little info on COVID19.
NB: As you will have understood, when I talk about COVID19, I am talking about the SARS-CoV-2 disease. It happens to me during this video to confuse the name of the virus and the name of the disease. Thanks for understanding.
This video is captioned.
Video chapters:
00:00 Introduction
00:55 Viruses, generalities
02:51 Types of viruses
04:06 Breeding
05:37 Immune defense
06:50 COVID19
10:23 Closing
All illustrations, illustrative videos and sound tracks seen and heard in this video are free of copyright.
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[@fabricevs5293]

Merci docteur 👍

[@davistos8350]

Merci

[@auroreb.4362]

Merci merci !

[@alexispugni5464]

Super vidéo
Merci

[@drc]

Merci à vous !

[@AlfDeMelmac]

Merci pour vos explications. A-t-on un ordre de grandeur du nombre de virus (ou bactéries) neutralisés par seconde dans un individu en bonne santé ?

[@drc]

Oula c'est pointu ça comme question ! Aucune idée ça doit varier selon les circonstances je suppose..

[@AlfDeMelmac]

@@drcOK. merci d’avoir essayé de répondre.

[@ratabeukgeorge901]

Bonjour Docteur C j'aimerais savoir dois-je investir toutes mes économies dans le bitcoin ?

[@drc]

Haha !

[@kingofmambo]

Oui