Original link. https://reaction19.fr/wp-content/uploads/2021/02/Synthese-des-donnees-recueillies-grace-a-lutilisation-oxymetres.pdf

This association is currently suing in France against the obligation to wear masks https://reaction19.fr/wp-content/uploads/2020/12/Plainte-masques-fusionnée-signée.pdf. Translate with Google Chrome. I suggest every parents to create an association to do the same.

Translation (sorry for the pagination)

Summary of the data collected through the useoximetersIn a few weeks REACTION 19 received 29 certificates from members who measured their oxygen saturation rate before and after wearing the mask for several hours during.These measurements were taken on children and adults throughout France.

Here is the summary:Schoolchildren (primary school) (7-11 years old): Global data :➢ 11 certificates➢ Starting rate: 99% -97%➢ Final rates: 91% -77%Details:➢ 11-year-old child living in Hérault after wearing the mask for 9 hours : Starting rate: 96%o Final rate: 88%➢ 8-year-old child living in Drôme after wearing the mask for8 hours 30 min: Starting rate: 99%o Final rate: 86% ➢ 10-year-old child living in the Loiret after having worn the mask for 8 hours : Starting rate: 99% Final rate: 83% 9-year-old child living in the Var after wearing the mask for 8hours: Starting rate: 99% Final rate: 89%➢ 10-year-old child living in Hauts-de-Seine after wearing the mask for 8 hours: Starting rate: 99% Final rate: 93%➢ 11-year-old child living in Haut-Rhin after wearing the mask for 6 hours: Starting rate: 98% Final rate: 91%➢ 8-year-old child living in Yvelines after wearing the mask for 8 hours 30: Starting rate: 99% Final rate: 86%➢ 7-year-old child living in Puy-de-Dôme after wearing the mask during 3 hours :Starting rate: 99% Final rate: 92%➢ 7-year-old child living in Drôme after wearing the mask for 8:30 am: Starting rate: 99%o Final rate: 92%➢ 9-year-old child living in Drôme after wearing the mask for 8:30 am:o Starting rate: 97%o Final rate: 91%➢ 9-year-old child living in Aisne after wearing the mask for 3hours: Starting rate: 99% Final rate: 90%➢ 7-year-old child living in Essonne after wearing the mask for 8h hours: Starting rate: 99% Final rate: 77% Middle school students (12-15 years old): Global data: 10 certificates Starting rate: 99% - 97%o Final rates: 97% -86% Details:➢ 13-year-old child living in Aisne after wearing the mask for 8hours: Starting rate: 99% Final rate: 90%➢ 13-year-old child living in Bas-Rhin after wearing the mask for 7 hours:o Starting rate: 98%o Final rate: 92%➢ 13-year-old child living in Yvelines after wearing the maskfor 4 hours: Starting rate: 98%o Final rate: 90%➢ 16-year-old child living in Aveyron after wearing the mask for 8 hours: Starting rate: 98%o Final rate: 93% 12-year-old child living in Moselle after wearing the mask for 7 hours: Starting rate: 99%o Final rate: 97%➢ 12-year-old child living in the North after having worn the mask for 4 hours : Starting rate: 99%o Final rate: 86%➢ 13-year-old child living in the Var after wearing the mask for 8hours: Starting rate: 98%o Final rate: 90%➢ 13-year-old child living in Maine-et-Loire after wearing the maskfor 7 hours: Starting rate: 98%o Final rate: 90%➢ 12-year-old child living in Paris after wearing the mask for 3 hours 30 minutes:o Starting rate: 99% Final rate: 86%➢ 13-year-old child living in Finistère after wearing the mask for 8hours: Starting rate: 97%o Final rate: 90% High school students (16-18 years old): 1 certificateDetails:➢ 17-year-old child living in Finistère after wearing the maskfor 8 hours: Starting rate: 99% Final rate: 88%Adults (31-84 years old):Global data: 7 certificates Starting rate: 99% - 96% Final rates: 94% - 86% Details:➢ 66-year-old person living in Ain after having worn the mask for3 hours : Starting rate: 98%o Final rate: 86%➢ Person of 37 years living in Eure after wearing the mask during 3 hours : Starting rate: 99% Final rate: 90%➢ 84-year-old person living in Eure-et-Loir after wearing the mask for 4 hours: Starting rate: 96%o Final rate: 85%➢ 62-year-old person living in Ain after wearing the mask for 2 hours :o Starting rate: 96%o Final rate: 94%➢ 31-year-old person living in Hérault after wearing the maskfor 7 hours: Starting rate: 96%o Final rate: 88% Person aged 41 living in Paris after wearing the mask for 1 hour: Starting rate: 99% Final rate: 94%➢ 50-year-old person living in Haut-Rhin after wearing the mask for 5 hours: Starting rate: 98%o Final rate: 91%