In some European countries, authorities have begun to loosen their lockdown rules as the death toll from the devastating pandemic drops.
Now people have began to consider the opportunity of travel this summer - and if it can happen safely.
In England, Health Secretary Matt Hancock said the traditional summer holiday is unlikely to occur - as social distancing is set to continue.
He told ITV's This Morning: "The conclusion from that is it is unlikely that big, lavish international holidays are going to be possible for this summer."
But governments abroad - whose lockdowns are now being relaxed - are still considering what can be done to boost the ailing tourism industry.
Now, a study from Madrid's Esade Business School have proposed a solution.
It wants countries to split into 'green' and 'red' zones, determining the severity of Covid-19 in that area - and for people to travel accordingly.
The system could see travel between Bavaria, in Germany, and Crete, in Greece, authorised if they are awarded the 'green' label by the European Union.
Across borders, it could see train stations not stop at 'red' stations, whilst airports would not offer flights to some countries.
The policy proposal states: "Allowing ‘green bridges’ to exist between regions where the virus is under control – regardless of whether the latter are in the same country – could help save the tourism sector, the economic viability of several European countries, and probably also the balance within the European Union."
This could see travel allowed between countries where the virus is deemed under control - meaning the rate of new infections is low, testing is ongoing and there is no risk of overwhelming hospitals.
A version of this system is already in place in France where the country has been split in 'red', 'orange' and 'green' zones.
The health minister has revealed a map showing the worst-affected areas - which is measured by testing capacity, stress on hospitals and number of infections over the past seven days.
Currently, restrictions will be eased more rapidly in the 'green' areas than the 'red' zones, which includes the whole of the Paris region and northeast France.
Meanwhile in Spain, a four-stage plan was announced on May 4, with restrictions being eased in two week-blocks but only in some parts of the country.
Currently, Madrid, Barcelona, Granada, Malaga and some regions in the north-east will stay under full lockdown.
If this idea is picked up, the authors of the study claim it could "save the summer tourist season in southern Europe" because they rely on tourism more heavily than the northern countries.
But European Commissioner for Home Affairs Ylva Johansson told Euronews that member states cannot discriminate between EU passports.
She said: "If a border is opened, then all EU nationals can pass through that border."
