SKIP ADVERTISEMENT You have a preview view of this article while we are checking your access. When we have confirmed access, the full article content will load. One morning in April 2020, Ranawaka Perera cooked fried eggs and tomatoes for his wife, Li-Meng Yan. When she said she wasn’t hungry, he pressed her to eat anyway. Lately, Dr. Yan had been so anxious that at times she felt she could barely breathe, and Dr. Perera was worried about her health. Everyone they knew was stressed in early 2020.