The Hong Kong government has postponed September’s parliamentary elections by a year, saying it is necessary amid a rise in coronavirus infections.
Hong Kong is currently experiencing a spike in Covid-19 infections, and reported 121 new cases on Friday.
However, the opposition has accused the government of using the pandemic as a pretext to stop people from voting.
Hong Kong has had more than 100 daily new cases, for 10 days in a row.
The overall numbers are still lower than those of many other places – but the spike comes after Hong Kong appeared to have contained the outbreak, with weeks of few or no local infections.
Now, it’s experiencing what’s been described as a “third wave” of infections, and Ms Lam says she fears Hong Kong’s hospitals will be overwhelmed by new cases.
Health experts have told the BBC that, with the reintroduction of social distancing measures, the rate of infection appears to have slowed, and they hope Hong Kong will be back to close to zero local infections within four to six weeks.