As the corona virus continues to spread across the globe the pressure is on drug makers to develop a vaccine and bring it to market quickly. vaccines are preventive medicines they reduce the risk of catching certain illnesses they do this by imitating infections thy introduce dead or weakened versions of the disease causing germs known as antigens into the immune system
When the immune system detects these foreign invaders they create anti bodies to attack them an because our immune system is like a library it stores information and remembers every germ it's ever detected so if we encounter thee real germ in the future our immune system can quickly trigger the memory cells and produce antibodiees to defeat it unfortunately it take quite a bit of time to develop license and release a new vaccine ranging from several months to over ten years.
Once vaccines are developed in labs they must go through three phases they come to market first small groups receive the trial vaccine, then it given to larger group of people and finally it's tested ob hundred's of thousands of people some experts say there's 94 percent failure rate in developing the vaccine from discovery phase to the licensing the Food and Drug Administration will license it only if it's proven to be safe and effective if the benefits out weigh the risk but the vaccine might not be worth the effort many viruses mutate so a vaccine that one year might bee less effective or not work at all the next today there's no working vaccine for HIV malaria or tuberculosis so these diseases continue to kill millions around the world each year . so we can wait for a good news from drug developers from the world.