Covid 19 Immunity

Immune system 'remembers' SARS-CoV-2 infection for at least 6 months, study finds

The researchers found a decline in the virus neutralising antibody activity with time, but the number of memory B cells remained unchanged.

Depression, stress dampen the efficacy of immune system, COVID-19 vaccines, study finds

Many COVID-19 vaccines already in circulation are up to 95 percent effective, provided other conditions including mental health are met.

Scientists predict that SARS-CoV-2 virus may resemble common cold-causing viruses in the future

How fast this shift comes to be depends on the virus spreads and how immune systems respond to vaccines, the researchers said.

Protective immunity against novel coronavirus may last for over eight months, new study claims

The study also clarifies some concerning data from other institutes that showed a dramatic drop in COVID-fighting antibodies in the months post-infection.

People who develop Coronavirus antibodies much less likely to test positive again for up to six months or more: Study

It was found that antibodies themselves may not be giving the protection, they might just be a sign that other parts of the immune system, such as T cells, are able to fight off any new exposures to the virus.

Covid-19 immunity: ‘Natural immunity’ from Covid-19 infection better than a vaccine?

Considering the unknowns, Covid-19 vaccines have predictably prevented illness, and would be a far safer bet, experts said.

China prepares for rollout of domestic Covid-19 vaccines in trial, pursues international deals

Orders for experimental, domestic Covid-19 vaccines are coming in, even though health officials are yet to vouch for them.

Russian scientists explore promising link between BCG vaccine & Covid-19 immunity explored in research review

The study claims it is possible the BCG vaccine won't be as effective in adults who weren't vaccinated as children.

US scientists develop nasal spray to prevent COVID-19, effective for six months

A key advantage of this approach is that it doesn't need a competent immune system for it to be effective in preventing COVID-19.

Effective immunity to SARS-CoV-2 infection, once developed, could last years, new data hints

The study, while still under peer-review, is the most comprehensive and long-ranging study of immune memory to the coronavirus to date.