That was a dry run

1976 Swine Flu? Doesn't matter. Pretty much the same thing happened the second time around.

When the US Government Tried to Fast-Track a Flu Vaccine

Problems plagued the program from the start, however. One drug company produced 2 million vaccine doses with the wrong viral strain. Tests could not achieve suitable antibody levels in children. And with the compressed timeframe precluding the typical years of experimentation and clinical trials, insurance companies refused coverage for vaccine makers in the case of inevitable adverse reactions.

Although photographs of Ford receiving a vaccination were distributed in hopes of rallying support, public confidence was further shaken when dozens of vaccine recipients were diagnosed with Guillain-Barré syndrome, a rare neurological disorder causing muscle weakness, tingling in the extremities and paralysis.

That wasn't the best article about it, but I'm rushing and it'll work.

A brief, terrifying history of viruses escaping from labs: 70s Chinese pandemic was a lab mistake