Democratic Senator Richard Blumenthal called on cruise lines to halt all cruise operations and urged health agencies to impose stricter curbs.
Cruise ships are ‘repeating recent history as petri dishes of Covid-19 infection,’ Blumenthal, said.
"Time for CDC and cruise lines to protect consumers and again pause, by docking their ships," he tweeted.
Even with vaccination requirements and stricter mask rules, the number of positive cases aboard ships has surged in the past week.
Multiple ships have been turned away from several ports.
The Centers for Disease Control and Prevention (CDC) is investigating dozens of cruise ships.
There are 68 cruise ships under a yellow classification which prompts an investigation over positive Covid cases or if health data it sends to the CDC is insufficient.
Ships being monitored include vessels from Carnival, Disney, MSC Cruises, NCLH, Royal Caribbean and Celebrity.
