"Something dramatic changed, & that is the case definition. Before, tests were done on patients who had pneumonia and required [intensive care]. But now people are being tested not because they are sick, but because they had contact with a patient. Some of these tested positive, but many of them don’t really get sick." Edit: Found working link to article: https://www.science.org/content/article/mers-virologists-view-saudi-arabia-rev2 https://web.archive.org/web/20210907033939/https://www.science.org/content/article/mers-virologists-view-saudi-arabia-rev2