FILE - A health worker uses a pulse oximeter to check the oxygen saturation level of another after administering COVID-19 vaccine at a hospital in Gauhati, India, Jan. 21, 2021. (AP Photo/Anupam Nath, ...
How to use oximeter correctly: Breathlessness and shortage of oxygen have caused serious damage and are among the major reasons that have left people gasping for breath and also caused fatality.
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