MARTIN QUIN POLLARD FORMER high school teacher Ailia was devastated when her 85-year-old father died after displaying COVID-like symptoms as the virus swept through their hometown in the southeastern province of Jiangxi. While her father was never tested, Ailia and her mother were both confirmed positive around the same time and she believes that COVID was a cause in his death. As hundreds of millions of Chinese travel to reunite with families for the Lunar New Year holiday starting Jan. 21, many will do so after mourning relatives who died in the COVID-19 wave that has raged across the world's…