Hongkonger Ms Lam has long known she is carrying a ticking time bomb after her mother and grandmother died of liver cancer. Her mother was completely asymptomatic until a late-stage diagnosis left no option for surgery. “I knew I carried the hepatitis B virus when I was in my twenties and had since then undergone regular health check-ups to manage the bomb,” the woman in her fifties recalled. Her regular checks were only disrupted during the Covid-19 pandemic. When she returned for a check-up in...