After saying incubation period for Covid-19 is 4 to 5 days,
more data leads National Institutes of Health (NIH) researchers
to lengthen it to 7 to 8 days.

https://www.medicalnewstoday.com/ar...ubation-period-to-7-7-days#Recall-theory

Sample quote

For 10% of people, the incubation period was longer than 2 weeks (14.28 days),
and in 1% of cases, the estimated incubation period was more than 20 days.

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