Ten experimental vaccines for covid-19 are already being trialled in people but we don’t know yet if it’s possible to induce long-lasting immunity with a vaccine
Source:
https://www.newscientist.com/article/mg24632853-400-124-coronavirus-vaccines-are-in-development-but-will-any-work/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home