We found many cases of covid-19 infection who suffer second time within 2-3 months after the first infection. It indicates the status of immunity of the infection which in most cases of other viral infection that imparts long time immunity even life long immunity. It is same type of immunity like influenza infection. Effectivity of influenza vaccine usually last for 6 months due to changing its antigenicity. So this vaccine lost its popularity in most of the countries particularly in developing countries and manufacturers failed to make business from this vaccine. In the same way, I am afraid that Covid-19 vaccine will fail to make much money of the manufacturer in few months and no more than 6 months.
COVID-19 vaccines are not going to provide life long immunity against the SARS-CoV-2 infection.
Mujibur Rahman I agree with your findings and comments but numbers of subsequent infections/cases are too low to count as an indicator of vaccine failure yet. It may require more intensive studies to verify the claim.
COVID-19 vaccines are not going to provide life long immunity against the SARS-CoV-2 infection.
I agree with your opinion. But I'd like to mention that these vaccines will build immunity against SARS-CoV-2 for a certain period of time. After that, booster doses have to be taken.
Now, it's about the side effects of these vaccines. Actually, we've got insufficient data about the side effects of COVID-19 vaccines. So, we cannot claim against the vaccines properly. For that, we need effective and complete investigation.
None of the currently approved SARS-CoV-2 vaccines will provide life-long immunity to the disease but can only last for 5 months. However, vaccine against flu must also be repeated within a certain timeframe in order to boost immunity.
Again, It's too early to say anything about whether or not they will actually be effective.
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