The race for a coronavirus vaccine has begun.
Three possible vaccines are already in in the United States and China. According to the World Health Organization, other vaccine candidates are in earlier stages of development.
But there鈥檚 still a long way to go before we know if any of options will work against COVID-19. Dr. Anthony Fauci says the earliest a vaccine could be available is between , even with expedited testing.
We talk to Dr. Ruth Karron of the Center for Immunization Research at Johns Hopkins University about what vaccinologists will be doing in that year and a half to help crack the code on coronavirus.
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