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There are four types of COVID-19 vaccines part 19

What are viral vector-based vaccines and how could they be used against COVID-19? All vaccines are work by exposing the body to molecules from the target pathogen to trigger an immune response-but the method of exposure varies. Here’s how viralvector-based … Continue reading

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There are four types of COVID-19 vaccines part 18

How easy are they to manufacture? In both cases, vaccines for different antigens could be manufactured within the same facilities, further reducing costs.This is not possible for most conventional vaccines.

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There are four types of COVID-19 vaccines part 17

How easy are they to manufacture? Both DNA and RNA vaccines are  relatively easy to produce, but the manufacturing process differs slightly between them. Once DNA encoding the antigen has been chemically synthesized, it is inserted into bacterial plasmid with … Continue reading

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There are four types of COVID-19 vaccines part 16

How easy are they to manufacture? Once a pathogen’s genome has been sequenced, it is relatively quick and easy to design a vaccine against any of its proteins.  For instance, Moderna’s RNA vaccine against COVID-19 entered clinical trials within two … Continue reading

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There are four types of COVID-19 vaccines part 15

How do nucleic acid vaccines trigger immunity? Once the DNA or RNA is inside the cell and it starts  producing antigens, these are then displayed on its surface, where they can be detected by the immune system, triggering a response. … Continue reading

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There are four types of COVID-19 vaccines part 14

How do nucleic acid vaccines trigger immunity? RNA vaccines encode the antigen of interest in messenger  RNA (mRNA) or self-amplifying RNA (saRNA)-molecular templates used by cellular factories to produce proteins. Because of its transitory nature, there is zero risk of … Continue reading

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There are four types of COVID-19 vaccines part 13

How do nucleic acid vaccines trigger immunity? DNA plasmid carrying the antigen are usually injected into the muscle, but a key challenge is getting them to cross into people’s cells. This is an essential step, because the machinery which enables … Continue reading

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There are four types of COVID-19 vaccines part 12

How do nucleic acid vaccines trigger immunity? In the case of DNA vaccines, a piece of DNA encoding the antigen is first inserted into a bacterial plasmid. This is a circular piece of DNA used by a bacterium to store … Continue reading

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There are four types of COVID-19 vaccines part 11

Advantages and disadvantages of nucleic acid vaccines Immune response involves B cells and T cells No live components, so no risk of the vaccine triggering disease Relatively easy to manufacture Some RNA vaccines require ultra-cold storage Never been licensed in … Continue reading

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There are four types of COVID-19 vaccines part 10

What are nucleic acid vaccines and how could they be turned against COVID-19? All vaccines work by exposing the body to molecules from the pathogen to trigger an immune response-but the method of exposure varies. Here’s how DNA and RNA … Continue reading

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