역대 최고 스피드 코로나 백신 개발,...어디까지 왔나?<br /><br />Creating a vaccine usually requires years of extensive research with multiple phases of clinical trials.<br />But the race to develop a vaccine for COVID-19 is set to break the world record and become the fastest-made in history.<br />Taking a look at how the process has been speeded along and at what stage it's currently at, Lee Kyung-eun reports.<br />Making a vaccine usually requires a three-phase clinical trial.<br />Phase One is a test of a vaccine's safety...using small doses on a small group of people.<br />During Phase Two the number of participants is increased to three-hundred.<br />Phase Three tests its effectiveness...requiring at least three-thousand volunteers.<br />But in developing a COVID-19 vaccine, many researchers are combining the first two phases,... to speed up the process.<br />As of last week, the World Health Organization confirmed one-hundred-80 vaccine candidates...with 35 beginning clinical trials.<br />Nine of them reached the final phase.<br />And of those nine, four have been developed by Chinese institutes.<br />Three are based in the U.S.,... including Moderna, which received government assistance under the so-called "Operation Warp Speed" policy.<br />Another candidate, Johnson and Johnson, aims to trial its vaccine on the largest scale of them all...using some 60-thousand participants.<br />And there's one each from the UK and Russia.<br />But the Oxford University-made AstraZeneca ....had to temporarily PAUSE its trial after one participant suffered a potentially serious adverse reaction.<br />In the meantime, three institues,... China's 'Sinovac' and 'CanSino'... and Russia's 'Gamaleya' have had their vaccines approved without finishing Phase Three.<br />At this speed any fully-tested COVID-19 vaccine would still become the fastest-made in history,...as it usually takes 10 years on average.<br />But experts are concerned about the potential medical and SOCIAL side effects of a fast-tracked vaccine.<br />We don't want poorly evaluated vaccines to undermine public confidence in the safety and efficacy of the vaccines we use something against as dangerous as COVID-19. Government regulators will need to review these data the same way they would review any vaccine dosiate."<br />Meanwhile, the WHO suggests that a safe vaccine would mean having at least 50-percent efficacy.<br />Lee Kyung-eun, Arirang News.<br />
