Cruise companies’ share prices took off on the New York Stock Exchange yesterday after Pfizer and BioNTech SE announced that their mRNA-based vaccine candidate has demonstrated evidence of efficacy against Covid-19 and that, presumably , the first doses will be available by the third week of November.

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In a press release from the Biden-Harris transition team, President-elect Joe Biden recalled, however, that “the timeline previously announced by industry officials had already expected the vaccine to be approved by the end of November. Even if this date is confirmed, and some Americans are vaccinated by the end of the year, it will be many more months before there is widespread vaccination in this country . “

A caution that did not scare investors. As of yesterday’s close of trading, Carnival Corporation shares were up 39.9%, Royal Caribbean Group shares by 28.9% and Norwegian Cruise Line Holdings Ltd. shares by 21.2%.