Although several months have passed since the start of the global vaccination campaign against the new coronavirus, there are still many questions about current immunization solutions.
Several researchers have already hypothesized that the vaccine against Covid-19 could become one that is given to you annually. The reason could be related to the fact that new strains of the virus are discovered at various time intervals. From this point of view, it could it looked like the flu shot.
Information on this subject came online in the context in which Moderna is testing a new version of its coronavirus vaccine. It is tested on the same people who have participated in previous clinical trials.
The new vaccine it should protect you when it comes to a new, more contagious form of the virus. Ian Haydon is among those who received practically the third dose of vaccine from Moderna, although the real usefulness of the new vaccine is relative.
“It is unclear whether this new modified version of the vaccine will really be needed,” Haydon was quoted as saying. CNN. The variant against which the man was vaccinated is B.1.351 from South Africa. Among the side effects he felt after the vaccination were fever, chills, a little nausea, headache. “
Immunologists say this is a sign that the immune system is responding to the vaccine, although people who do not report symptoms also develop an immune response, so the symptoms do not seem to suggest that someone has a better response than someone who does not develop a fever.
As for the immunity obtained by vaccination with the current sera available on the market, it seems to exceed half a year. Immunologist Scott Hensley, a vaccine expert at the University of Pennsylvania, believes that studies to date show that immunity may last more than 6 months.
Importantly, there are many antibodies generated by Messenger RNA vaccines. Vaccines have also caused the body to produce immune cells known as T cells and B cells that can maintain defenses for years.
“Antibody responses to these mRNA vaccines are incredibly high. What we know from animal models with other mRNA vaccines that have been tested before is that those antibody responses are incredibly long-lived and do not decrease over time, ”added Hensley, whose lab has been testing experimental mRNA vaccines for years. In the past, it has been used in the development of vaccines against influenza, Ebola or Zika virus.
Immunity for at least six months has also been confirmed by Pfizer researchers, although it could be significantly higher than that. “We are delighted that we can now say firmly that it will take at least 6 months. That’s all we can say now, but the protection analysis process is underway, “said epidemiologist John Segreti, medical director at Rush Medical College, Chicago.