COVID-19 tend to have low oxygen levels.The finding has helped uncover some of the mystery behind how the virus attacks the body and how relentless it can be.The research suggests symptoms can start with a headache or confusion.
There can also be a lack of symptoms until the person ends up in hospital.Dr. Shok Rolla Elahi’s team studied the blood of 128 COVID-19 patients.
Study participants included those who were critically ill and admitted to intensive care, those who had moderate symptoms and were admitted to hospital, and those who had mild symptoms and only spent a few hours in hospital.As the disease became more severe, the study found that more immature red blood cells flooded into blood circulation — sometimes making up as much as.