A new trial is to test how well the Oxford-AstraZeneca coronavirus vaccine works in children.
Some 300 volunteers will take part, with the first vaccinations in the trial taking place later in February.
300 volunteers will take part in the research in the United Kingdom to assess whether the coronavirus vaccine will produce a strong immune response in children aged between six and 17.
Thai scientists are also developing their own COVID-19 vaccines in different projects, one of which is a COVID-19 vaccine produced using inactivated virus propagated in chicken eggs, the same technology as used to produce many types of influenza vaccines.
Up to 240 subjects will receive the vaccine, while the rest will receive a control drug.
Those interested in taking part must complete a short questionnaire. "It is therefore important to collect data on the safety and the immune response to our coronavirus vaccine in these age groups, so that they could potentially benefit from inclusion in vaccination programs in the near future".
The University of Oxford has launched a study to assess the safety and immune response of the COVID-19 vaccine it has developed with AstraZeneca Plc in children for the first time, it said on Saturday.
There are now no plans for children to be vaccinated with the Oxford-Astrazeneca jab in the United Kingdom, as it has only been authorised to prevent Covid in people aged 18 or over.
"The COVID-19 pandemic has had a profound negative impact on the education, social development and emotional wellbeing of children and adolescents, beyond illness and rare severe disease presentations", Rinn Song told the Guardian. It said other trials had begun but only measuring efficacy in those aged 16 and 17. "The role of children in transmission, once they have acquired the infection, is unclear, although there is no clear evidence that they are any more infectious than adults".
A third vaccine, from Moderna, has been approved for use in the United Kingdom but supplies are not expected to arrive until spring.