NOV 09, 2020 9:13 AM PST

COVID-19 Vaccine by Pfizer More than 90% Effective

WRITTEN BY: Annie Lennon

A preliminary analysis of Pfizer and BioNTech's COVID-19 vaccine shows that it can prevent over 90% of people from contracting COVID-19. 

For the study, researchers tested the vaccine on over 43,000 people across six countries: the US, Germany, Brazil, Argentina, South Africa, and Turkey. During the Phase 3 trial, volunteers either received the COVID-19 vaccine, administered in two shots around three weeks apart, or a placebo alternative such as a meningitis vaccine. Neither doctors nor patients knew which they had. 

So far, the results look positive. From an interim analysis of the first confirmed 94 cases of COVID-19 among those involved in the research, scientists found that fewer than 10% of infections- or around eight people- had received the vaccine. This means that over 90% of the cases were people who had received the placebo. 

Pfizer has said that the vaccine had an efficacy rate of more than 90% at seven days after the second dose, meaning that protection is achieved within 28 days of beginning the vaccination process. While the companies behind the vaccine aim to have it approved by the end of the month, they aim to be able to assess 164 confirmed cases of COVID-19 infection among trial participants before final results are published.

The vaccine itself is based on a new approach involving messenger RNA (mRNA). Unlike other vaccines that directly use the virus, this vaccine uses the virus's mRNA to cause cells in the body to produce proteins that resemble the virus. This then triggers an immune response that recognizes and attacks these proteins, which are theoretically summoned again if the virus enters the body. 

While the vaccine is deemed to be effective, the CEO of Pfizer, Dr Albert Bourla, said that it is still unknown how long protection from the vaccine will last. He added that it is likely that people will need periodical vaccinations to ensure immunity. Regardless, Bourla has said that Pfizer expects to produce 50 million vaccine doses by the end of this year and 1.3 billion next year. 

 

Sources: BBCCNNThe Guardian

About the Author
  • Science writer with keen interests in technology and behavioral biology. Her current focus is on the interplay between these fields to create meaningful interactions, applications and environments.
You May Also Like
SEP 27, 2020
Cell & Molecular Biology
How Spiders May Open a Path to IBS Treatment
SEP 27, 2020
How Spiders May Open a Path to IBS Treatment
Irritable bowel syndrome (IBS) is term that describes a gut disorder that causes abdominal pain, cramping, diarrhea or c ...
OCT 05, 2020
Drug Discovery & Development
Fecal Transplants Could Restore Cognitive Function in the Elderly
OCT 05, 2020
Fecal Transplants Could Restore Cognitive Function in the Elderly
An international team of researchers has found that fecal transplants could one day be used to restore cognitive functio ...
OCT 20, 2020
Drug Discovery & Development
New Treatment Reverses Late Stage Type 2 Diabetes
OCT 20, 2020
New Treatment Reverses Late Stage Type 2 Diabetes
Researchers from the Netherlands have developed a minimally invasive therapeutic procedure that allows people to discont ...
OCT 07, 2020
Technology
Millimeter-Precision Drug Delivery
OCT 07, 2020
Millimeter-Precision Drug Delivery
It is almost impossible to deliver targeted drug therapy via the bloodstream without reaching the entire brain and body ...
NOV 03, 2020
Cardiology
A New Peptide Could Help Repair and Protect the Heart During Ischemia Reperfusion Injury
NOV 03, 2020
A New Peptide Could Help Repair and Protect the Heart During Ischemia Reperfusion Injury
Cardiovascular disease is one of the most common causes of death in the world. Although we have many treatments against ...
DEC 02, 2020
Immunology
A Shingles Vaccine for Cancer Patients
DEC 02, 2020
A Shingles Vaccine for Cancer Patients
Receiving a vaccine (usually in the form of an inactivated pathogen) triggers an immune response without the symptoms of ...
Loading Comments...