There is still no vaccine for either SARS or MERS. Many scientists were close to developing a vaccine but lack of funding and containments of both syndromes resulted in research being abandoned. Writing in March 2020, Gabriella Nunez from clickorlando.com states that 8,098 fell sick from SARS with 774 dead across 20 countries.
“SARS coronavirus (SARS-CoV) – virus identified in 2003. SARS-CoV is thought to be an animal virus from an as-yet-uncertain animal reservoir, perhaps bats, that spread to other animals (civet cats) and first infected humans in the Guangdong province of southern China in 2002” https://www.who.int/ith/diseases/sars/en/
“Seventeen years after the Severe Acute Respiratory Syndrome (SARS) outbreak and seven years since the first Middle East Respiratory Syndrome (MERS) case, there is still no coronavirus vaccine despite dozens of attempts to develop them” https://www.scmp.com/news/china/science/article/3051853/there-was-no-vaccine-sars-or-mers-will-there-be-one-new