The coronavirus outbreak that started in China has infected more than 20,000 people and killed more than 400.<br />According to Business Insider, cases have already been recorded in 24 other countries.<br />Fortunately, most patients have seemed to make full recoveries so far.<br />However, the Chinese Health Commission warns that even those who've recovered could be at risk of reinfection.<br />One expert says that's because the antibodies that patients are producing so far don't necessarily last very long.
