New York — The US Centres for Disease Control and Prevention (CDC) has escalated its warning for cruise travel to the highest level and continued to recommend avoiding any trips on cruise ships worldwide.

The agency raised its warning to level four from three, citing “very high” risk of Covid-19 on cruise ships. Passengers are at increased risk of person-to-person spread of Covid-19 and should get tested and stay home for at least seven days after travel, according to its website...

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