Lab accidents happen.
When the first Severe Acute Respiratory Syndrome (SARS-1) pandemic ended in 2003, lab-acquired infections continued.
Immediately following the end of the 2003 pandemic of SARS-1, there were four separate outbreaks of lab-acquired infections of SARS-1 within one year at three different labs in Beijing, Singapore and Taipei. The situation was so bad that Science Magazine warned, “health experts fear that the next SARS epidemic may be more likely to emerge from a research lab than from the presumed animal reservoir.”
In one lab accident, a 26-year-old graduate student was exposed while working at the Institute of Viral Disease Control at the Chinese CDC. Her mother caught the disease from her and died.