In 1992 while at the University of Tennessee, Tsai led a team attempting to develop electrostatic filtration technology.[1][5] Their research was successful and led to the creation of the N95 face mask filter. The material consists of both positive and negative charges, which are able to attract particles — such as dust, bacteria and viruses — and trap at least 95 percent of them by polarization before they can pass through the mask.[1][2] It was patented in the U.S. in 1995.[2][4][5]
俺以前有一次肺炎住院，打一种消炎药不起作用，医生立刻换另一种厉害的再打，仍不起作用，再换第三种更厉害的，打进去时哇血管都隐隐作疼，worked 了，立刻不发烧了。
一句话，咱们在美国的就偷着乐吧。好药大大的有。
今年俺都阳俩回了，吃了Paxlvoid就又出去浪了，呵呵。
我反正是真生病需要药的昨天差点买不到。只买到了generic brand的。不要低估国内疫情对这边的潜在影响。
交给中国生产，上次被中国扣压了。
但药品不同，包括晶片美国也要求台积电在美国设厂，晶片的设计则一直都美国公司。again, 高端的产品美国是掌控的。
当然通过这次，美国意识到低端产品有些也必须在本土。
walgreens carries 的 其它所有牌子，所有牌子都满满摆着。 我买了 Mucinex 液体版感冒药。
那里，万一当地药房没药咋办？ 我连温度计， home test kit 都带齐，准备就地被染， 就地应付。
美国人。
In 1992 while at the University of Tennessee, Tsai led a team attempting to develop electrostatic filtration technology.[1][5] Their research was successful and led to the creation of the N95 face mask filter. The material consists of both positive and negative charges, which are able to attract particles — such as dust, bacteria and viruses — and trap at least 95 percent of them by polarization before they can pass through the mask.[1][2] It was patented in the U.S. in 1995.[2][4][5]
坐飞机也是只在进出飞机的时候才戴，飞机也是满员，看过周老大的链接，飞机舱内气流是每排垂直的。
在迪斯尼没看到几个人咳嗽，我没打第四针，暂时没事，带了核酸盒没做。