Twenty months into a pandemic that has claimed almost 770,000 American lives and nearly a year after Covid-19 vaccinations became available, US health experts warn a fifth wave of infections risks overwhelming health systems in the worst-affected states.
Fears of another surge in infections come on the cusp of the Thanksgiving holiday, when tens of millions of Americans will travel to reconnect with their families, some of them for the first time since the start of the pandemic.
But what was expected to be a celebration has become fraught with danger in some Midwestern states, where vaccination rates are low and Covid-19 cases are rising rapidly after a summer lull.
您已閱讀12%（676字），剩余88%（4899字）包含更多重要信息，訂閱以繼續探索完整內容，并享受更多專屬服務。