ah, so you didn't read the article I guess, because it never says that they don't work 100% just says the evidence that they do isn't great, it also covers what the writer sees at downsides (cost) to masking children. Its fine to have differing views but you should probably focus your arguments on the substance of article. The author laid out several very compelling paragraphs to back up her point along with sources cited, so I'm sorry, but if the only counter argument you can come up with is "its bullshit" you should probably quit the debate club.