According to scientists, the coronavirus vaccine could give people immunity from the bug for 90 days.
A study carried out by the scientific advisors of the government shows that vaccine immunity is not well understood.
Experts say the duration of “natural or vaccine-induced immunity is not yet fully understood” in a paper published by the Recent and Evolving Respiratory Virus Threats Advisory Committee.
The study comes after the Pfizer/BioNtech coronavirus vaccine was approved last week by British regulators.
Researchers added that immunity would last 90 days after having a Covid-19 jab, Mirror says.
They wrote: “Based on the variability in the data and differential responses in the population we conservatively estimate that a protective immune response after SARS-CoV-2 infection or vaccination may last for 90 days.”
Their calculation is based on the fact that after one or two years, other coronaviruses appear to reinfect.
Seasonal coronavirus reinfections are commonly recorded at 12 months and often as early as six months, but not within three months, scientists said.
“They explained: “Based on this evidence, we conclude that Within one month of natural infection, a high proportion of individuals will develop immunity that protects against reinfection-induced disease (high confidence).
It is likely that this defense will continue for at least three months (moderate confidence).
“The extent of defense against subclinical (as opposed to disease) re-infection is unknown.
They said that a high proportion of people develop immunity which is protective against disease caused by reinfection (high confidence).” 28 days after an effective vaccine.
Experts added that after either natural infection or vaccine, a small percentage of people do not gain immunity – but the number is said to be small relative to the majority who get immunity.
According to NERVTAG,’ in most cases, natural immunity is maintained.’
The document added that at least 90 percent of people who have been infected with the virus can detect coronavirus antibodies, and this number exceeds 100 percent with new studies.
Within around a week of symptoms emerging, the antibodies can be assessed, the paper added.
The paper, which was released on Friday, was considered on 19 November by SAGE.
Scientists said coronavirus vaccine trials “suggest that a high degree of immunity to COVID-19 disease can be obtained, at least in the short-term.”
Despite some uncertainty about the degree and length of immunity, experts concluded: “Some form of Covid-19 immunity certification is likely to be necessary but further data and considerations are needed before a decision can be made.”
After the country became the first in the world to authorize the Pfizer jab for use, vaccinations in the UK will begin next Tuesday.
The four chief medical officers of the United Kingdom have warned that the roll-out of coronavirus vaccines would only have a ” marginal impact ” over the winter on hospital numbers.
They said the health services are set to face a difficult three months ahead in a letter written to colleagues.
The letter read: “For the NHS and broader health and social care services, winter is always a difficult time. Because of Covid-19, this year will be exceptionally difficult.”
“Though it’s very great news about vaccines means that we can look forward more to 2021 with greater optimism, vaccine deployment will only have a marginal effect on reducing the number of people coming into the health service with Covid over the next three months.”