No country had the foresight to fund that team out of Texas back in 2013-2016 who were actively looking to develop a coronavirus-family vaccine after SARS. And because Obama and other countries said no, they never bothered to approach Trump's administration afterward (and they likely wouldn't have funded it either). Everything got shoved into cold storage to gather dust.
NBC News - Scientists were close to a coronavirus vaccine years ago. Then the money dried up.