Compare COVID Vaccines: Oxford/Astrazeneca vs Moderna vs Pfizer (Sept 2020) - John Campbell

Published: 02 Sep 2020  ·  Uploaded: 05 Sep 2020 Watch on
2343 views  ·  24 mins ago 35:46

Video Description (from Youtube)
University of Oxford and AstraZeneca

Development of COVID-19 vaccine AZD1222 expands into US Phase III clinical trial across all adult age groups (AZ, 31st August)


Based on a chimpanzee adenovirus

US, $1.2 billion

EU, ordered 400 m doses

1st deliveries October

Can make 2 billion doses

Millions already produced in India

So far

N = 543

14 days after receiving the vaccine

91% to 100% produced neutralizing antibodies

Anti-spike IgG

These antibodies prevent viruses from infecting healthy cells

Therefore, likely to protect against COVID-19

Local and systemic reactions

No serious adverse events

Phase 3, 28 June, Brazil


Final testing stage in US

Enrolment for phase 3 clinical trials opened

30,000 adults, aged 18 years or over

Diverse racial, ethnic, and geographic groups

Healthy or have stable underlying medical conditions

Randomly assigned

Saline control, or two doses of AZD1222,

Four weeks apart

Twice as many people will receive the vaccine than not

Testing for efficacy and safety

The immune responses of 3,000 evaluated in detail

Other late-stage AZD1222 trials have already begun in South Africa, Brazil, India, United Kingdom

Russia and Japan soon,

50,000 participants worldwide


So far

One dose caused some to produce binding antibodies

Two doses caused all to produce neutralizing antibodies

August 11, US, an additional $1.5 billion

Messenger RNA (mRNA)

adenine, cytosine, uracil, guanine

Translation in the cytoplasm


Copy of part of the virus's genetic sequence

Protected by a lipid nanoparticle

Directs cells to make a protein that works as a drug or vaccine


Phase 3 clinical trials began July 27

30,000 healthy adults

2 doses

Test for safety

If the vaccine can prevent symptomatic COVID-19

? how long will antibodies last


US / German

US, $1.9 billion pre-order

So far

mRNA vaccine

Generates antibodies virus-neutralizing antibodies

Generates T cells


Phase 3 clinical trials started July 27

30,000 health adults in the US

Expected to expand to 120 sites globally.

Two-dose regime

Encodes an optimized SARS-CoV-2 full-length spike glycoprotein

Which is the target of virus-neutralizing antibodies

To seek regulatory approval October

Up to 100 million doses by the end of October 2020

China and Russia

Skipped phase 3 trials


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Shared on: 05 Sep 2020

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