Kalen Keegan, a college student at the University of Nebraska Omaha, immediately noticed when her Twitter account unleashed a torrent of posts in Chinese. "My other account got hacked????????," the soccer player posted on a replacement account. The new author tweeting as @Kalenkayyy had strong views on geopolitics — all aligned with the Chinese Communist Party. It was obsessed with the protests in Hong Kong, offered uncritical praise of the Hong Kong police and accused demonstrators of fomenting a "color revolution" backed by an "anti-Chinese American conspiracy."

As the coronavirus outbreak led to a lockdown of Wuhan and its surrounding cities in late January, the Hong Kong posts were suddenly deleted. The account continued to post relentlessly in Chinese, but it now focused on the burgeoning epidemic.