Second appointments for some of the 60-69 age group are being brought forward.
Over 80% of the age group has been vaccinated.
This has to do with under-60s whose first vaccine dose was AstraZeneca.
Appointments from June 2 for under-60s whose first dose was AstraZeneca.
Final decisions yet to be taken regarding the under-60s who had a first dose of AstraZeneca.
The government had banned it for those aged under 60 due to blood clot concerns.
Few serious side effects were reported among the 600 participants.
A group of people in queue to receive a vaccination shot.
AstraZeneca vaccine against the (COVID-19).
The health ministry would wait for the results of a clinical trial testing the effects.
A healthcare worker prepares a dose of Vaxzevria (previously AstraZeneca) COVID-19 vaccine
These are appointments for teachers and others who were given a first dose of AstraZeneca.
Last week, only 3,400 doses of AstraZeneca were received to vaccinate around 116,258 people aged 60-69 in the Balearic Islands.
The trial will draw on a sample of 600 people of all ages from across Spain
Options are being evaluated for people who have had a first AstraZeneca jab.
The J&J and AstraZeneca shots are two of the four approved COVID-19 vaccinations in Europe.
Probe of AstraZeneca vaccine and blood clots already ongoing.