From the BBC News website: Vaccine research continues to make news around the world and is being closely watched around the globe.
Here are some key points from around the region.
The first of three vaccines to be approved by the World Health Organisation is the Merck vaccine, which was approved for human use in the US.
Merck’s vaccine is the first to be marketed in Europe.
More than two dozen other countries are considering the approval.
The vaccine is currently in clinical trials in the UK, France, the Netherlands, Norway, Switzerland, Denmark, Canada and Sweden.
The World Health Organization (WHO) says it will publish a report on Merck vaccines soon.
There is growing concern about the safety of the vaccines and the need for more research into the benefits and risks.
The European Medicines Agency has suspended all Merck approvals.
This will affect the UK as well as a number of other countries, including the US, Australia and New Zealand.
Merkel has pledged to protect the vaccine from misuse and adulteration, while other countries have also called for tighter restrictions.
A vaccine that will be made by the German company AstraZeneca will be approved for use in Africa.
More information about vaccines can be found at the BBC website.