possibility of involving to Covid-19 PaO2/FiO2 < 300 mm Hg or SpO2 < 93% in air ambient or need to oxygen supplementary for SpO2 in range of 94-98% or lung infiltration > 50% consciousness of patient and to be able to complete letter of satisfaction minimum 18 years old

possibility of involving to Covid-19 PaO2/FiO2 < 300 mm Hg or SpO2 < 93% in air ambient or need to oxygen supplementary for SpO2 in range of 94-98% or lung infiltration > 50% consciousness of patient and to be able to complete letter of satisfaction minimum 18 years old