| masks_may_not_be_effective | ||
| Mercedes | https://www.sciencetimes.com/articles/25713/20200518/wearing-face-masks-potentially-harmful-trap-exhaled-viruses-well-individuals.htm?fbclid=IwAR1wg303epba1b-AkTEmmC0MJyezSwXTsxBf4kNG510XnljlsEpUVwuYxc4 | 200519 |
| ... | ||
| u24 | c.f. masks_may_not_be_effective | 200520 |
| ... | ||
| u24 | oh, stupid cave. | 200520 |