Meet 22-year-old Grace Li, a high school biology teacher who lives in New York City, and her mom Shixia Huang, a cancer researcher who lives in Texas. On Friday, Li told her mom that she wasn't feeling well.
"I was at work on Friday afternoon planning to work late that evening," the mom told BuzzFeed News. "Around 4:30, I got a message from Grace telling me that she felt sick."
"I called her and she told me that she had this headache and we also chatted about her day and her weekend plans. I felt that the headache was a bit unusual and that she missed home."