They are careless. I suspect mostly biotrailing. Small amounts of covid spread much earlier, but absent biotrailing, didn't go far. See "early spread" at https://billricejr.substack.com/
They are careless. I suspect mostly biotrailing. Small amounts of covid spread much earlier, but absent biotrailing, didn't go far. See "early spread" at https://billricejr.substack.com/
They are careless. I suspect mostly biotrailing. Small amounts of covid spread much earlier, but absent biotrailing, didn't go far. See "early spread" at https://billricejr.substack.com/