It was a cheap thing to do out of caution. But I guess, it's not in the culture to "over"-react. Sometimes it's good, sometimes it comes back to bite you.
I think the disease took a back door from the travellers (who got the information and probably were pretty careful) to taxi drivers and other people who met even the most sick travellers, then from taxi drivers to other occupations common in those suburbs including elderly care. So unfortunately I think among the first to be infected where the families of taxi drivers, who often work in elderly homes or in home care. This was very early even before the elderly homes were completely locked down.
