Coronavirus: What are the rules for face masks or face coverings?

US health advisors now say people who have been fully vaccinated against Covid-19 can gather unmasked with others who have been vaccinated.

They can also visit unvaccinated people from one other household indoors without masks or distancing so long as the unvaccinated people are not at high risk for severe Covid-19. But they should still wear masks when out in public.

The UK has yet to make such recommendations, however.

Face coverings and masks reduce the spread of coronavirus droplets from coughs, sneezes and speaking.

Currently, people in the UK are asked to wear them where social distancing is not possible and the virus could easily pass between people - for example on public transport, or in shops.

Cutting transmission is important because there is still lots of the virus circulating and many people are yet to be protected by vaccination.

The exact rules can be seen here for:

In England and Northern Ireland the police can issue a £200 fine for not following the rules. In Scotland and Wales, a £60 fine can be imposed. Repeat offenders face bigger fines.

Once more people have had a vaccine and more is known about how they affect the transmission of Covid, other measures to limit its spread can be reviewed, the government says.

This will include the wearing of face masks or coverings.

They might still be needed in some circumstances and particularly during winter, however.

Health Secretary Matt Hancock has said he hopes they would become the norm on public transport as a matter of "personal responsibility".

Pupils in secondary schools in England may be required to wear masks in classrooms, at least until the Easter break.

Each nation has different rules:

The main purpose of face coverings is to protect other people from coronavirus, rather than yourself. If everyone wears one, the risk for all goes down.

When worn correctly, they should cover the nose and mouth - the main confirmed sources of transmission.

They can help to reduce the spread of the virus from people who are contagious, including those who have no symptoms.

There is also evidence they can offer some protection to the wearer, although they are not a replacement for social distancing and hand-washing.

Tips for the wearer include:

The highest level of protection is provided by FFP3 (or similar) masks worn by healthcare workers in high risk settings to safely do their job.

In some countries, such as Germany and Austria, medical-grade masks (such as disposable surgical ones) are compulsory on public transport and in shops.

These are made from non-woven fabric, which is better at stopping spray and droplets.

Cloth face coverings do not give the wearer as much protection.

But the World Health Organization says it has no plans to change its guidance recommending fabric face masks for the general public.

Some people do not have to wear a face covering. They include:

Young children should not wear face masks because of the risk of choking and suffocation.

The BBC has created a guide on how to make your own face covering.

The government has issued its own advice too.