The portal for the total of 9,707 available slots for Covid-19 vaccines only for people aged 61 to 63 on Thursday morning crashed again within minutes.
The slots were to be made available between 7:30am and 8pm with only Pfizer and AstraZeneca vaccines on offer. All Pfizer vaccines were apparently taken before the crash.
A week ago the portal for this particular age group had again crashed and their inoculation had been interrupted.
The portal crashed amid heavy traffic and a rush to secure appointments for Pfizer and Moderna jabs over those of controversial Astrazeneca.
At the same time, Nicosia has delayed the start of administering Johnson & Johnson vaccines even though Cyprus received its first 2,400 such shots on Wednesday afternoon.
The delay comes as the European Medicines Agency (EMA) expects to issue a recommendation on controversial J&J next week.
The new development comes as the U.S. drug maker delayed its Covid-19 shot over the risk of blood clotting.
On Friday morning, the portal opens for people aged 53-54 and closes on Saturday afternoon.
Health Minister Constantinos Ioannou said on Wednesday Cyprus expected to receive an additional 100,000 Pfizer doses by June.
By Tuesday, April 13, a total of 193,537 people had received at least one dose of a Covid vaccine and 56,533 had received both doses, he also said.