RT @CarlvKeirsbilck: Petitie "Veilig onderwijs voor leerlingen en leraren tijdens corona" https://t.co/cv8sXaC46r 

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RT @CarlvKeirsbilck: Petition "Safety education for students and teachers during corona" https://t.co/cv8sXaC46r

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Harry Spoelstra MD PhD CardioVascular Surgeon, Visiting Prof, special interests: Universe/Our Galaxy, Nature/Weather, Stratosphere/PolarVortex, Covid19
Harry Spoelstra MD PhD Cardiovascular Surgeon, Visiting Professor, special interests: Universe / Our Galaxy, Nature / Weather, Stratosphere / Polar Vortex, Covid19