Covid 19 Delta Variant Vaccine

Many of us concern about Covid 19 Delta Variant Vaccine. All viruses, including SARS-CoV-2, evolve over time. When a virus replicates or makes copies of itself, it sometimes changes a bit, which is normal for a virus. These changes are called "mutations." A virus with one or more new mutations is called a "variant".

What makes a virus change to a new variant?

When a virus circulates widely in a population and causes many infections, the likelihood that the virus will mutate increases. If a virus gets chances to spread, the more it replicates.

Most viral mutations have little or no impact on the virus's ability to cause infection and disease. But depending on where the changes in the genetic material of the virus are located, they can affect the properties of a virus, such as transmission (for example, it can spread more or less easily) or severity (for example, it can cause more disease. or less severe).

Covid 19 Delta Variant Vaccine

The COVID-19 vaccines that are currently in development or that have been approved are expected to provide at least some protection against new virus variants because these vaccines elicit a broad immune response that involves a variety of antibodies and cells. Therefore, changes or mutations in the virus should not make vaccines completely ineffective. In the event that any of these vaccines are less effective against one or more variants, it will be possible to change the composition of the vaccines to protect against these variants.

Data on new variants of the COVID-19 virus continue to be collected and analyzed. WHO is working with researchers, health officials and scientists to understand how these variants affect the behaviour of the virus, including their impact on the effectiveness of vaccines. Please see the WHO Disease Outbreak News for up-to-date information on the impact of COVID-19 virus variants on the efficacy of different vaccines. This is an area where the evidence remains preliminary and is developing rapidly.

As we learn more, we must do everything we can to stop the spread of the virus to prevent mutations that can reduce the effectiveness of existing vaccines. In addition, manufacturers and programs using the vaccines may have to adapt to the evolution of the COVID-19 virus: for example, vaccines may need to incorporate more than one strain when they are in development, booster injections and other changes may be necessary for vaccines. Trials should also be designed and maintained to allow assessment of any change in efficacy and should be of sufficient scale and diversity to allow a clear interpretation of the results. Studies on the impact of vaccines as they are implemented are also essential to understand their impact.

The WHO had tracked mutations and variants since the start of the COVID-19 outbreak. WHO’s global network of SARS-CoV-2 laboratories includes a Task Force dedicated to the evolution of the virus, whose objective is to detect new changes quickly and evaluate their possible impact.

Research groups have performed genomic sequencing of the COVID-19 virus and shared these sequences in public databases, including GISAID. This global collaboration helps scientists to better track the changes of the virus. WHO recommends that all countries increase the sequencing of the COVID-19 virus whenever possible and share data to help each other monitor and respond to the evolving pandemic.

WHO has also established a SARS-CoV-2 risk assessment and monitoring framework to identify, monitor and evaluate the variants of interest. It will include components such as surveillance, research for variants of interest, and impact assessment on diagnosis, therapeutics, and vaccines. The framework will serve as a guide for manufacturers and countries on the changes that may be necessary for COVID-19 vaccines.

How can we prevent new variants of COVID-19?

Current measures to reduce transmission, including frequent hand washing, wearing a mask, physical distancing, good ventilation and avoiding crowded or closed places, continue to work against new variants by reducing the amount of viral transmission and, therefore, thus, also reduce the chances of the virus to moult. Only dedicated Covid 19 Delta Variant Vaccine is not discovered yet.

Scaling up vaccine production and implementing vaccines as quickly and widely as possible will also be critical ways to protect people before they are exposed to the virus and to the risk of new variants. We should give priority to vaccinating high-risk groups everywhere to maximize global protection against new variants. Additionally, ensuring equitable access to COVID-19 vaccines is more critical than ever to addressing the evolving pandemic. As more people get vaccinated, we expect the circulation of the virus to decrease, which will then lead to fewer mutations.

Vaccines are a critical tool in the battle against COVID-19, and there are clear public health and life-saving benefits from using the tools we already have. We must not postpone vaccination due to our concerns about new variants, and we must continue vaccination even if vaccines may be somewhat less effective against some of the COVID-19 virus variants. We need to use the tools we have on hand even as we continue to improve those tools. We are all safe only if everyone is safe.

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