While some have already hit the market, dozens of coronavirus vaccines are still in development around the world.
Some use proven technologies, others use new approaches. All vaccines have been tested differently, and some have been allowed to go live before thorough testing.
Its effectiveness varies and the results of preliminary studies range from 50% to more than 90%.
So far, regulators in several countries have allowed the use of half a dozen of them, most under emergency use conditions.
More are about to be done. Everything available now requires two doses, weeks apart.
Here are some of the more advanced vaccines:
–Pfizer: Developed with BioNTech; Licensed by the United States, United Kingdom, European Union, World Health Organization and other countries.
–Modern: Developed in conjunction with the US National Institutes of Health; Licensed by the United States, United Kingdom, European Union, World Health Organization, and other countries.
–AstraZeneca: Developed in collaboration with the University of Oxford; licensed from more than 40 countries, including Great Britain, India, Argentina, Mexico and the European Union.
–Sputnik V.: Developed by the Gamaleya Research Institute of Russia; authorized in Russia, Argentina and Bolivia, among a dozen countries.
–Sinopharm: Authorized in China and in some other countries such as Hungary, Serbia and Morocco.
–Sinovac: Authorized in China, as well as in Turkey, Brazil and Indonesia.
–Bharat Biotech: Authorized in India.
–Johnson & Johnson: Develop; a dose; Permission is expected to be filed with the U.S. Food and Drug Administration shortly.
–Novavax: Develop.