Many countries are beginning to offer a second booster dose of the Covid-19 vaccine to vulnerable groups, but some medical professionals are undecided on whether it would benefit the wider population.

Europe is accelerating steps to roll back coronavirus and many countries in has already lifted or eased the covid restrictions.

Starting from April 18, citizens from other countries will no longer be subject to travel restrictions when planning to enter Cyprus.

According to the recent government’s announcement.

Starting from Saturday, April 9, all travelers will be able to enter Czechia without being subject to any entry rules as the latter’s authorities have decided to drop all of their restrictions.

As of 1st of February 2022 there are no entry restrictions on internal border traffic within the EU or Schengen area. However, all passengers (born in 2006 or earlier) arriving in Finland have to go through health security measures.

Europe is opening up to Americans and other visitors after more than a year of restrictions According to a report published by Associated Press last week.

International Travel During COVID-19 The COVID vaccine will undoubtedly make travel a safer, and more realistic. The latest update for COVID 19 international travel published by The US center for disease control and prevention in July 10, there was a good news for the fully vaccinated people.

The new Indian strain, so-called “double mutant” version of the novel coronavirus has now reached several European countries.

Vaccine passports are increasingly viewed as the key to unlocking the world after a year of pandemic-induced lockdowns — a few bytes of personal health data, encoded on a chip, that could put an end to suffocating restrictions and restore the freewheeling travel that is a hallmark of the age of globalization.

To answer this question, the Healthline website has published a review of a study by the Centers for Disease Control and Prevention (CDC).

In an April 2 the CDC studied almost 4,000 vaccinated healthcare personnel, first responders, and other essential and frontline workers.

Boris Johnson has warned the effects of a third wave of coronavirus will "wash up on our shores" from Europe. The PM said the UK should be "under no illusion" we will "feel effects" of growing cases on the continent.

Reuters, March 24 - 2021

AstraZeneca may have released outdated information on its latest COVID-19 vaccine trial, giving an “incomplete” picture of its efficacy, a leading U.S. health agency said on Tuesday, casting doubt on the shot’s potential U.S. rollout and plunging its developers, once again, into controversy.

Reuters- Tuesday March 16. The head of Britain’s effort to sequence the virus’s genomes told Reuters that regular booster vaccines against the novel coronavirus will be needed because of mutations that make it more transmissible.

The New York Times - March 11, 2021

 The New York Times publish on Thursday march 11 about the worries in Europe and the warning response to the new British covid,  vaccine, the health authorities in three European countries on Thursday suspended use of AstraZeneca’s vaccine because of concerns that it might increase the risk of blood clots, but emphasized that they were taking action as a precaution and that there is no evidence of any causal link.

British Airways calls for vaccinated people to travel without restrictions

Reuters-  March 14, 2021

Sean Doyle, appointed BA's chief executive last October, called on Britain to work with other governments to allow vaccines and health apps to open up travel, after a year when minimal flying has left many airlines on life support.

CNBC NEWS - March 1, 2021
Johnson & Johnson's Covid-19 vaccine distribution to begin immediately and the first shots could be administered as early as Tuesday, senior Biden administration officials said Sunday.

• Vaccine Candidate 72% Effective in the US and 66% Effective Overall at Preventing Moderate to Severe COVID-19, 28 Days after Vaccination
• 85% Effective Overall in Preventing Severe Disease and Demonstrated Complete Protection Against COVID-19 related Hospitalization and Death as of Day 28.

The World Health Organization has issued this recommendations for use of the Moderna vaccine against COVID-19 in people aged 18 years and older.
This recommendations issued by WHO in 29 January 2021.

This Fact Sheet contains information to help you understand the risks and benefits of the Pfizer-BioNTech COVID-19 Vaccine, which you may receive.

From FDA, U.S. Food and Drug Administration - 25 February 2021 

The International Air Transport Association (IATA) proposed an interesting plan to adopt a COVID travel passport in 2021
To re-open borders without quarantine and restart aviation governments need to be confident that they are effectively mitigating the risk of importing COVID-19.

WHICH.co.uk  Feb 2021

Qantas and Saga have said COVID-19 inoculation will be mandatory when flights and holidays restart, with other airlines and destinations likely to follow suit.

11 February 2021,  WHO Newsroom

 In February the WHO has issued  a review and recommendations for use of the Oxford/AstraZeneca COVID-19 vaccine. This article provides a summary of this recommendations.

Reuters
MONTREAL/SYDNEY: Aviation industry opposition to requiring mandatory COVID-19 vaccination for passengers has intensified as impending drug approvals trigger a debate over their role in air travel.

Bloomberg

Airlines ask WHO to back quarantine free travel after vaccines.
The airline industry has called on the World Health Organization to rule it’s safe for people to fly without quarantining once they’ve had a coronavirus vaccine.