Just as the travel and hospitality industry was starting to pick up pace after nearly two years of a pandemic, a new variant of the coronavirus appears and changes most of the rules once again.
After an increase in Omicron cases worldwide, several countries have started to reconsider the validity of the vaccine and also require mandatory boosters for all visitors.
Here is a list of nations where reinforcement is required to enter the territory or access local establishments such as restaurants, bars and gyms.
On December 21, the EU Commission announced a 9-month (270-day) binding acceptance period for EU digital COVID certificates for intra-community travel.
A clear and standard acceptance period for vaccination certificates will ensure that travel measures remain coordinated across the bloc, the Commission said.
This means that booster shots will be needed in most European countries in the coming months.
Those who cannot present an EU digital certificate will not be able to enter bars, restaurants and other public places.
Domestic travel is also restricted for people who have not been vaccinated or who have not received the booster vaccine within seven months of the last dose.
Entry into France without a booster injection is still possible by presenting a negative PCR test.
However, a third shot is required to enter all indoor spaces, including restaurants, bars, museums and public transport.
As of February 2022, the Netherlands will only accept vaccination certificates proving that the holder has received a COVID-19 booster dose.
Swiss authorities consider a person fully vaccinated when they have received two doses of a vaccine in the last 365 days.
Entry into the country without booster is still possible, but most locations are restricted to those who have received the full series of a COVID-19 vaccine.
Starting December 6, travelers who were fully vaccinated more than 9 months ago will face a 10-day quarantine and multiple tests to enter the country if they cannot present a booster certificate.
People who had their second vaccine 270 days or more before entering Croatia must present a negative PCR test.
Those unable to present the EU COVID Digital certificate will not have access to most closed locations.
Israel has placed some of the most strict restrictions In all world. Travelers are considered fully vaccinated only if the last dose was given within 280 minutes of arrival. Otherwise, they will need to produce a booster vaccine certificate.
Visitors to the country must provide proof of reinforcement shots to enter and leave the country. A negative PCR test is also required.