Times are changing, and more and more tour operators are choosing to mandate the COVID-19 vaccine for all guests. This is due to a number of factors, including traveler safety and wellbeing, the spread of the Delta variant worldwide and the fact that many countries are requiring travelers to be vaccinated to enter, and/or to visit popular attractions, attend events and eat at restaurants. Here's the list of the tour operators that are requiring the COVID-19 vaccine for all guests (so far). Read More.