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Vaccines outline #828

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35 changes: 33 additions & 2 deletions content/20.pharmaceuticals.md
Original file line number Diff line number Diff line change
Expand Up @@ -790,6 +790,8 @@ Dendritic cells are potent antigen-presenting immune cells that easily take up m
Ultimately, primed T follicular helper cells can stimulate germinal center B cells that also present the viral antigen to produce antibodies against the virus [@doi:10.1016/j.immuni.2014.10.004].
These cells are isolated from the patient, grown and transfected _ex vivo_, and reintroduced to the patient [@doi:10.1038/nrd.2017.243].

####### ModernaTX mRNA Vaccine

mRNA-1273 was the first COVID-19 vaccine to enter a phase I clinical in the United States.
ModernaTX, Inc. is currently spearheading an investigation on the immunogenicity and reactogenicity of mRNA-1273, a conventional lipid nanoparticle encapsulated RNA encoding a full-length prefusion stabilized spike (S) protein for SARS-CoV-2 [@clinicaltrials:NCT04283461].
In a study that is ongoing, forty-five participants were enrolled and given intramuscular injections of mRNA-1273 in their deltoid muscle on day 1 and day 29, and then followed for the next twelve months.
Expand All @@ -809,7 +811,36 @@ As of August 2020, placebo-blinded and randomized results for mRNA vaccines are
In the dose ranging study, even the lowest dose of 25 μg of mRNA-1273 appeared to be sufficient to induce an immunogenicity profile comparable to that observed in convalescent plasma and appeared to be well tolerated among the population of healthy, non-pregnant participants from 18-55 years of age.
Based on the preliminary results from mRNA-1273 [@doi:10.1056/NEJMoa2022483], a new trial aims to enroll 30,000 participants who will be randomized for two injections of 100 μg of mRNA-1273 or placebo, again spaced 28 days apart [@clinicaltrials:NCT04470427].

##### Adjuvants for Vaccines
###### Pfizer/BioNTech BNT162b2

###### Viral Vector Vaccines

####### COVID-19 Vaccine AstraZeneca

####### Sputnik-V

####### Janssen’s Ad26.COV2-S

###### Inactivated Whole Virus Vaccines

<!--Rephrase to match figure? Or rephrase figure?-->

####### SinoVac's CoronaVac
<!--https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30843-4/fulltext-->

####### Sinopharm (2 candidates)

###### Protein Subunit Vaccines

<!--Do we need to add this to the figure? Or does it fall in one of the other categories?-->

####### Novavax NVX-CoV2373

###### Vaccine Development Summary

##### Complementary Approaches to Vaccine Development

###### Adjuvants for Vaccines

Adjuvants include a variety of molecules or larger microbial-related products that have an effect on the immune system or an immune response of interest.
They can either be comprised of or contain immunostimulants or immunomodulators.
Expand All @@ -820,7 +851,7 @@ A variety of possible mechanisms for adjuvants have been researched [@doi:10.103
Selection of one or more adjuvants requires considering how to promote the advantageous effects of the components and/or immune response and, likewise, to inhibit possible deleterious effects.
There are also considerations related to the method of delivering (or co-delivering) the adjuvant and antigen components of a vaccine.

##### Trained Immunity
###### Trained Immunity

Another approach that is being investigated explores the potential for vaccines that are not made from the SARS-CoV-2 virus to confer what has been termed trained immunity.
In a recent review [@doi:10.1038/s41577-020-0285-6], trained immunity was defined as forms of memory that are temporary (e.g., months or years) and reversible.
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