Great work, thank you for sharing it with the world.

I am very curious about country stats and have 2 questions.

First, I found this one randomly: https://www.armbrustusa.com/blogs/mask-review/kf94-try-mask-...

The country of origin on your page says China, but the photo's box says Korea. Is this a mask repackaged and exported from Korea that is actually from China?

Second, does "China" also include Taiwan? If so, I would be interested in separating them for statistics.

for those interested, here's a first level breakdown of pass/fail by country

  | country   | # pass | # fail | pass rate |
  |-----------+--------+--------+-----------|
  | USA       |     39 |     27 |        59 |
  | China     |     48 |    186 |        21 |
  | Korea     |     31 |     13 |        70 |
  | Thailand  |      0 |      2 |         0 |
  | India     |      2 |     12 |        14 |
  | Mexico    |      1 |      0 |       100 |
  | Germany   |      0 |      1 |         0 |
  | Singapore |      1 |      0 |       100 |
  | Vietnam   |      1 |      0 |       100 |

also, in this dataset it looks like adult masks have a 66% pass rate as a whole, while kids masks have a 73% FAILURE rate!

So a third question is, are you using adult mask testing methods for testing kid masks as well (which would explain the failure; on the other hand, the kid masks that passed must be quite some mask!), or do kid masks just suck in general?