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Last Updated : Jul 24, 2020 07:12 AM IST | Source: Moneycontrol.com

Coronavirus vaccine: Here's why it takes so long to develop a vaccine

Worldwide, trials of about a dozen potential coronavirus vaccines have begun recently. How quickly those trials can determine whether the vaccines are safe and effective depends on how widely the coronavirus is still spreading.

According to the World Health Organisation (WHO), researchers are making good progress in developing vaccines against COVID-19 but their first use cannot be expected until early 2021. Worldwide, testing of about a dozen potential coronavirus vaccines recently started or is about to start. The most promising vaccine candidates are expected to move into larger tests this summer. How quickly those studies can determine whether the vaccines are safe and effective depends in part on how widely the coronavirus is still spreading. A look at why it takes so long to create a vaccine. (Image: News18 Creative)

According to the World Health Organisation (WHO), researchers are making good progress in developing vaccines against COVID-19 but their first use cannot be expected until early 2021. Worldwide, trials of about a dozen potential coronavirus vaccines have begun recently. How quickly those trials can determine whether the vaccines are safe and effective depends on how widely the coronavirus is still spreading. Let's take a look at why it takes so long to create a vaccine: (Image: News18 Creative)

Stages of vaccine development. (Image: News18 Creative)

Stages of vaccine development. (Image: News18 Creative)

Before a vaccine is created. (Image: News18 Creative)

Before a vaccine is created. (Image: News18 Creative)

How is safety and efficacy tested | Phase 1 | Safety trial (Image: News18 Creative)

How is safety and efficacy tested | Phase 1 | Safety trial (Image: News18 Creative)

How is safety and efficacy tested | Phase 2 | Efficacy trial – 1 (Image: News18 Creative)

How is safety and efficacy tested | Phase 2 | Efficacy trial – 1 (Image: News18 Creative)

How is safety and efficacy tested | Phase 3 | Efficacy trial – 2 (Image: News18 Creative)

How is safety and efficacy tested | Phase 3 | Efficacy trial – 2 (Image: News18 Creative)

Next step after vaccine trial is done. (Image: News18 Creative)

Next step after vaccine trial is done. (Image: News18 Creative)

When the world is short of time. (Image: News18 Creative)

When the world is short of time. (Image: News18 Creative)

First Published on Jul 23, 2020 05:16 pm
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