The Hangzhou State Key Laboratory had already found three new coronavirus strains at the end of January, which means that the vaccine strain can be cultivated for vaccine isolation. However, it takes at least three months from the emergence of the seed strain to the vaccine strain to the emergence of the vaccine. Because after the vaccine strain has been cultivated, it will take about a month for Phase I and Phase II clinical tests to be conducted and for the national testing center to pass the test. It will take at least three months until it is ready for clinical use. Once the new coronavirus vaccine is available, it will be of great use to susceptible populations, allowing for early prevention and reduced morbidity. Source: Dr. Yurai