Covid: Will Pfizer, Moderna vaccines provide long-term immunity?.
Dhanusha Gokulan | Khaleej Times.
Filed on 2021-07-06 | Last updated on 2021-07-06 00:36:56
Vaccines manufactured by Pfizer-BioNTech and Moderna set off a persistent immune reaction in the human body that may protect against Covid-19 for years, scientists reported recently.
A study published in the Nature journal stated there is growing evidence that most people immunised with messenger RNA (mRNA) vaccines may not need boosters, as long as the virus and its variants do not mutate beyond its current form.
The study also said that people who recovered from Covid-19 before being vaccinated may not require the booster dose, even if the virus undergoes significant transformation. However, it remains unclear whether vaccinations alone will have long-lasting effects against the Covid-19 pandemic.
Doctors in the UAE have said that while the study results are promising, there needs to be more research to conclusively state that mRNA vaccines will be long-term solutions against Covid-19.
On Sunday, the UAE’s Ministry of Health and Prevention (MoHAP) announced the approval of the emergency registration of Moderna’s Covid-19 vaccine.
MoHAP decided to introduce the vaccine in the country after the completion of clinical trials and a strict assessment conducted to approve the local emergency use of the vaccine.
Dr Prasanna Kumar, a critical care specialist and in-charge of the intensive care unit at Medeor Hospital in Dubai, said, “mRNA technology is a modern method of developing vaccines and is touted to be the future in vaccine development.”
Dr Kumar said traditional vaccines put a weakened or inactive virus into human bodies to trigger the development of antibodies. “This is not the same in the case of mRNA vaccines. Instead, mRNA vaccines teach the body’s cells to produce a protein that boosts the production of antibodies. This immune response helps us in countering the actual virus when it enters our body and keeps us safe from contracting the infection,” he said.
“So, the latest studies have found that the mRNA vaccines offer a longer immune response to Covid-19. The scientists who studied samples have found that the immune cell responses located in the germinal centre of the lymph nodes remained active for a longer period than expected. This indicates that these vaccines offer extended protection,” he added.