How Nine Covid-19 Vaccines Work

Researchers are testing 78 coronavirus vaccines in clinical trials on humans. Here are explanations about how nine of the leading vaccines work.

Messenger RNA Vaccines

Comirnaty

How the Pfizer-BioNTech Vaccine Works

Cómo funciona la vacuna de Pfizer-BioNTech

The vaccine, known as Comirnaty, has been approved or authorized for emergency use in many countries, including the United States. Clinical trials showed the vaccine has an efficacy of 95 percent.

mRNA-1273

How Moderna’s Vaccine Works

Cómo funciona la vacuna de Moderna

The vaccine, known as mRNA-1273, has been authorized for emergency use in the United States, the European Union and other countries. Clinical trials showed the vaccine has an efficacy of 94.5 percent.

Adenovirus-Based Vaccines

AZD1222

How the Oxford-AstraZeneca Vaccine Works

Cómo funciona la vacuna de Oxford-AstraZeneca

The vaccine, known as AZD1222 or Covishield, is authorized for emergency use in dozens of countries. A large clinical trial showed the vaccine has an overall efficacy of 79 percent. Some countries paused use of the vaccine in March over concerns about possible rare blood clots.

Ad26.COV2.S

How the Johnson & Johnson Vaccine Works

Cómo funciona la vacuna de Johnson & Johnson

The vaccine, called Ad26.COV2.S, is authorized for emergency use in the United States, the European Union, Canada and other countries. Clinical trials showed that a single dose of the vaccine has an efficacy rate of 72 percent in the United States.

Sputnik V

(Ad26)

Sputnik V

(Ad5)

New · How the Gamaleya Vaccine Works

Cómo funciona la vacuna Gamaleya

The vaccine, known as Sputnik V or Gam-Covid-Vac, is a combination of two different Adenoviruses, Ad26 and Ad5. The vaccine is in use in Russia and dozens of other countries. Gamaleya published a study in February showing the vaccine had an efficacy rate of 91.6 percent.

Protein-Based Vaccines

NVX-CoV2373

nanoparticle

How the Novavax Vaccine Works

The vaccine, known as NVX-CoV2373, is in Phase 3 trials. A clinical trial showed it had an efficacy rate of 89 percent. The vaccine has not been authorized by any country.

Inactivated Coronavirus Vaccines

BBIBP-CorV

How the Sinopharm Vaccine Works

Cómo funciona la vacuna de Sinopharm

The vaccine, known as BBIBP-CorV, is approved in China, Bahrain and the United Arab Emirates, and has been authorized for emergency use in several other countries. Clinical trials showed that it had an efficacy rate of 79 percent.

CoronaVac

How the Sinovac Vaccine Works

Cómo funciona la vacuna de Sinovac

阅读简体中文版 · 閱讀繁體中文版

The vaccine, known as CoronaVac, is approved in China and authorized for emergency use in several other countries. Trials in Brazil found an overall efficacy of just over 50 percent, the minimum threshold set by many regulatory agencies for authorizing a coronavirus vaccine.

Covaxin

New · How Bharat Biotech’s Vaccine Works

The vaccine, known as Covaxin, is authorized for emergency use in India and other countries. Early trial results showed it has an efficacy of 80.6 percent.

See the Coronavirus Vaccine Tracker for more information, and for the status of other vaccines in development.

Tracking the Coronavirus

友情链接:葡京app_首页  电子游戏注册_首页  电子游戏下载_首页  电子游戏下载  银河注册|银河开户官网  电子游戏下载|电子游戏下载app  电子娱乐游戏在线  电子游戏网站大全  葡京真人_官网  银河注册|银河开户官网