The authors note this regimen may be beneficial while vaccine supplies are initially limited. "In the long term, a second dose should ensure long-lived immunity, and so we encourage everyone who has had their first vaccine to ensure they receive both doses".
Faced with a resurgence in infections and new, highly transmissible variants of the virus, many countries are hoping to broaden immunization by giving some protection to as many people as possible with a first dose, while delaying subsequent shots.
Speaking at press briefing in Abuja, the Director General of NAFDAC, Professor Mojisola Adeyeye, said the agency got the dossier of the vaccine a week ago, while its safety committee went to work immediately to evaluate its safety and efficacy for Nigerians.
Scientists are urging people to have two doses of the vaccine to increase its protection levels.
The Saudi Food and Drug Authority (SFDA) has approved the import and use of the Oxford-AstraZeneca Covid-19 vaccine within the kingdom.
The private sector could purchase the vaccine from overseas and the government in his regard did not impose any restriction, he assured.
The Department of Health is not expecting the 5,700 first doses and 3,700 second doses of Moderna vaccine to Wyoming locations this week due to the weather problems in other states.
Also Wednesday, Mexico " s Defense Secretary, Gen. Luis Cresencio Sandoval, announced he had tested positive for COVID-19. According to the study, the antibody levels against the SARS-CoV-2 spike protein remained at similar levels for three months. According to the researchers, including those from the University of Oxford in the United Kingdom, this dosage regimen is beneficial while vaccine supplies are initially limited, and may allow countries to immunise a larger proportion of the population more rapidly.
The Institute said clinical trials of the vaccine had shown "reactions usually occur shortly after vaccination and are not associated with more severe or prolonged illness".