Focus Taiwan has posted a report on today’s developments.
A housekeeper in her 60s working at the Novotel Hotel in Taoyuan tested positive last week; today her husband, son, and daughter tested positive too.
The pilot (the one who for some reason was allowed to do his quarantine at home and not in a hotel) who had infected his under-five-year-old child has also reportedly infected his daughter.
From the pilot’s case, I can gather that quarantining at home with family members present is a bad idea, especially with the UK variant around.
This virus is no joke. 
Guy