Day 120 - Oximeter and Oxford

2 women arrived on my doorstep, dressed in blue plastic overalls. They were municipal healthcare workers and wanted to test oxygen saturation. I extended my left hand and one of them clipped the oximeter to the index finger. The reading is changla, she said and added that I should get my hands washed. I felt happy. R admonished me for opening the door without wearing a face mask.

 How does the Pulse Oximeter work?

A bit of good news to begin the new week. The Oxford Vaccine ChAdOx1 nCoV-19 has triggered immune response in 1077 people. 140 vaccines are currently in pre-clinical trials. 10 have advanced to Phase I and 10 to Phase 2. 3 vaccines are in Phase 3 trials. 

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