周二（9月7日），美国疾病控制与预防中心（CDC）更新旅行建议，警告美国人不要前往斯里兰卡、牙买加和文莱，因为这些国家的COVID-19 病例数量不断增加。
CDC将这些国家的旅行警告提高到“4 级：非常高”。CDC的旅行建议一共分四级，第四级意味着避免旅行。
U.S. CDC warns against travel to Sri Lanka, Jamaica, and Brunei
The U.S. Centers for Disease Control and Prevention on Tuesday warned against travel to Sri Lanka, Jamaica and Brunei because of the rising number of COVID-19 cases.
The CDC raised its travel advisory to "Level 4: Very High" for those countries, telling Americans they should avoid travel there.
当天，CDC 还将荷兰、马耳他、几内亚比绍和阿拉伯联合酋长国的评级从“4 级：非常高”下调至“3 级：高”，敦促未接种疫苗的美国人避免前往这些目的地。
CDC将澳大利亚从“1 级：低”提高到“2 级：中等”。将安圭拉、安提瓜和巴布达、贝宁、加纳、格林纳达、特克斯和凯科斯群岛提高到“3 级”。
The CDC also eased its ratings for the Netherlands, Malta, Guinea-Bissau and United Arab Emirates from "Level 4: Very High" to "Level 3: High," which urges unvaccinated Americans to avoid travel to those destinations.
The CDC also raised Australia from "Leve1 1: Low" to "Level 2: Moderate."
In addition, the CDC raised its advisory level for Anguilla, Antigua and Barbuda, Benin, Ghana, Grenada, Turks and Caicos Islands to "Level 3."
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