QR codes - bar codes that can be read by mobile phones - have been used in China during the pandemic.
from BBC News - World https://ift.tt/2J3Ors5
from BBC News - World https://ift.tt/2J3Ors5
Covid-19: China pushes for QR code based global travel system
![Covid-19: China pushes for QR code based global travel system]()
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November 22, 2020
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