There are many strains of Coronavirus causing disease all over the world. It is also mutating. So, is it possible that a single type of vaccine would be effective all over the world? Or should there be a region-specific vaccine?
These are the latest articles on progress on COVID-19 vaccines
1. Safety and immunogenicity of the ChAdOx1 nCoV-19 vaccine against SARS-CoV-2: a preliminary report of a phase 1/2, single-blind, randomised controlled trial
https://www.thelancet.com/action/showPdf?pii=S0140-6736%2820%2931604-4
2. Immunogenicity and safety of a recombinant adenovirus type-5-vectored COVID-19 vaccine in healthy adults aged 18 years or older: a randomised, double-blind, placebocontrolled, phase 2 trial
https://www.thelancet.com/action/showPdf?pii=S0140-6736%2820%2931605-6
Dear Syed
Researchers in the US and UK have identified hundreds of mutations to the virus which causes the disease Covid-19.
But none has yet established what this will mean for virus spread in the population and for how effective a vaccine might be.
Viruses mutate - it's what they do.
The question is: which of these mutations actually do anything to change the severity or infectiousness of the disease?
source: By Rachel Schraer 6 May 2020 Health BBC News
No.
140 candidates vaccines
Every country has its own research vaccine
Separate mechanism of action.
Nelson Elias , Sir most vaccines have developed after many years of trials. Most vaccines are not against viruses which mutate so fast. This virus is mutating too fast.
What is your knowledge about Russian COVID19 vaccine?
Have you any details about their publication
Nirmal Mohakud , just heard they will start production by next month. But no specific studies or trials known. There was news of Russian hackers attacking firms involved in vaccine research. So, things are still unclear.
You will find this link interesting.
https://www.nature.com/articles/s41541-020-0198-1
Talha Bin Emran, thanks for the article. It’s from May 2020 and a number of new developments have occurred. A number of people have been reinfected. This shows that the acquired immunity is short-lived. As the authors of the article mention in the conclusion, a universal vaccine looks difficult.
Scientists are racing to develop a single vaccine that protects against many SARS-CoV-2 variants, as well as emerging coronaviruses with the potential to cause pandemics. BioNTech and Pfizer have announced that they will start testing a universal vaccine for coronaviruses in humans in the second half of 2022. The first variant-proof Covid-19 vaccines are expected to be available by 2024.
It is important to note that the development of a universal COVID-19 vaccine is still ongoing and it is not yet available.