Greek Prime Minister Kyriakos Mitsotakis said the country has been hit by the "fourth wave" of the virus as Europe continues to reel under the coronavirus pandemic.

Greece faces fourth wave as Germany, Czech Republic battle virus surge

As several European nations reopen and allow tourists, the World Health Organization's (WHO) Hans Kluge, regional director for Europe, said that Europe is "by no means out of danger".

We are by no means out of danger, WHO alerts Europe on virus resurgence

European Union(EU) on Wednesday agreed to allow visitors from outside the bloc vaccinated with EU-authorised vaccines. Watch: "EU ambassadors agreed to update the approach to travel from outside the European Union," Christian Wigand, EU spokesman said.

As Europe reopens, European Union to ease travel restrictions for non-EU tourists

It's May 14, the same day when the first smallpox vaccine was administered way back in 1796. It took 200 years to eradicate smallpox. Now, with the Wuhan virus, the vaccines are far more advanced but how are countries faring in giving these shots?

Why COVID-19 vaccination has become a challenge worldwide

More than a quarter of adults in the European Union would be unlikely to take the COVID-19 vaccine when it was offered to them, a survey published on Thursday showed.

Over a quarter of EU adults would refuse COVID-19 shot, survey says