More information can be found at the U.S. Embassy website: https://ec.usembassy.gov/covid-19-information-ecu-2/
These requirements are according to the latest mandate by the president of Ecuador on February 27th, 2022. The official requirements can be read here.
Has the Omicron variant reached Ecuador?
The Omicron variant has reached Ecuador. The first 2 waves have already passed.
Can I get a booster shot in Ecuador as a tourist?
Short answer: Yes. However, not all vaccine options are available (though, in theory, this shouldn’t matter).
If you’re traveling at the time that you should get your Covid booster shot, you can access one of many vaccination centers in Quito or Guayaquil. According to a recent testimony, “The MinSalud/Quito people were vaccinating all comers, no questions asked. You *must* have certification of initial vaccination(s) and ID doc matching name on the certificate. Hours are 08h00-15h30.”
In terms of the vaccine type, it is Astra Zeneca across the board, unless you are immuno-compromised. Then you will get the shot that you originally received. You need a doctor’s note that you are immuno-compromised.