Given that 50 million catch the flu in the US each year would you say 1 in 6 people actually get tested for it or it's an estimation based on years of data. I'

Given that 50 million catch the flu in the US each year would you say 1 in 6 people actually get tested for it or it's an estimation based on years of data. I'd be incredibly wary of anyone claiming to know how many have been infected by a novel virus only discovered 3 months ago. You simply can't estimate that with current data. Not to mention the heavily tourist dependent countries in Asia that are willfully ignoring testing and updating the media on statistics. The 4th biggest country on Earth which has a large number of tourists for Chinese New Year has reported 2 confirmed cases as of today. Tad doubtful.