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> https://www.healthline.com/health/covid-respiratory-or-vascu...

Why COVID-19 is considered to be a respiratory disease

Medical professionals and researchers have been studying the link between COVID-19 and vascular symptoms since the beginning of the pandemic [..] These observations led to several hypotheses that COVID-19 was a vascular disease with respiratory symptoms and not a respiratory disease.

Studies in 2020 and 2021 supported this theory. These studies concluded that although people with mild to moderate COVID-19 only had respiratory symptoms, COVID-19 was primarily a vascular disease. However, additional studies published later in 2021 and into 2022 have contraindicated these findings. New studies indicate that COVID-19 doesn’t attack the vascular system at all.