If you aren’t nervous enough already, here’s something else to worry about. In December 1929, at the time of the Great American stock market crash, America suddenly fell victim to a pandemic. The disease, called psittacosis, had been known about since 1892, but such was the state of that fear that gripped the nation in 1929 that it’s existence and threat was blown out of all proportion.

On 6 January 1930 a doctor that examined one of the first cases sent a telegram to the US Public Health Service in Washington DC that read; “Can you please supply parrot fever serum for our disposal immediately.” Further panic about contact with diseased birds then ensued. One US Admiral even ordered sailors to toss their pet parrots overboard, while the New York Times ran a front page that read: “Parrot Fever Kills 2 in this country.”

There were 169 confirmed cases of parrot fever in the US and 33 Americans eventually died. So was America in 1929 a dangerous place or just a gullible one? Parrot fever exists today in the US (and elsewhere) and infects between 100 and 200 Americans every year. The only difference is that over-exposure to social media is currently spreading economic anxiety rather than parrot fever.