RO (R-nought) calculation

Watch the video below, and research what the current RO (R-nought) calculation is for the current worldwide Corona Virus Outbreak . Should we REALLY be concerned that we could see a future wave of the Covid-19 outbreak that may worse than what we already have seen?
https://www.youtube.com/watch?v=jKUGZvW99os
https://www.youtube.com/watch?v=jKUGZvW99os
https://nsu.instructure.com/courses/2489322/files/141488921/download