While the Moderna COVID-19 vaccine led to strong immune and antibody responses for at least six months after clinical trial participants, it is likely that the immune response could last much longer.
Only 20% of adults in Bulgaria, which has a population of 7 million, have so far been fully vaccinated.
That suspension came after the health ministry said two men, aged 30 and 38, died in early August after getting their second Moderna doses.
Some doses might have been administered, but no adverse health effects have been reported so far, officials said.
It is the second COVID-19 shot authorized in the UK for those between ages 12 to 17, after the Pfizer vaccine.
The first million doses will arrive in Australia in late September and 10 million Moderna shots are scheduled to be delivered to Australia this year, Health Minister Greg Hunt said.
In a final analysis from its Phase 3, or final stage, clinical trial, Moderna's Covid vaccine showed 93 percent efficacy at six months following the second dose.
The decision by the Amsterdam-based agency follows the approval of the first vaccine for European youngsters, by Pfizer/BioNTech in May.
54-year-old President Luis Abinader who had previously received two doses of the Chinese Sinovac vaccine from Sinopharm, this time received a Pfizer shot.
According to sources, the Indian government has put forth certain conditions for finalising the indemnity clause contract and has sent it to the US drug manufacturer for their perusal.
It was the second shipment to Sri Lanka from the global COVAX effort after an AstraZeneca delivery in March.
Moderna's vaccine was given the green light for use in anyone 18 and over across the 27-nation European Union in January.
The high antibody levels after a single Sputnik V dose in naive participants suggest a benefit of delaying second dose administration to increase the number of people vaccinated.
The mRNA vaccines by Pfizer and Moderna contain genetic instructions for our cells to make the spike protein of the SARS-CoV-2, which the virus uses to infect and enter the human cells.
Sri Lanka has reportedly decided to obtain a loan of USD 150 million from the Asian Development Bank to buy vaccines and boost refrigeration and transport facilities.