Both of which are useless against what people 'think' they should do and certainly not the panacea that some have put across as providing!
Blue surgical masks have a maximum effective use time of 10 minutes, 20 at the most, as soon as they become saturated with water vapour they are useless at trapping viruses... the most they do is form a minimal barrier for particles but then that leads to a false sense depending on how the user takes them off and disposes of them.
Even the FFP3 masks we wear for infected cases only last for 10 hours max!, so imagine how often the people you see on the street have changed theirs (or not!)
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