Speed of COVID-19 vaccine race raises safety concernsThe frenetic race to develop a COVID-19 vaccine has intensified safety concerns about an inoculation, prompting governments and drugmakers to raise awareness to ensure their efforts to beat the coronavirus aren't derailed by public distrust.There are more than 200 COVID-19 vaccine candidates in development globally, including more than 20 in human clinical trials.
US President Donald Trump has vowed to have a shot ready before year's end, although they typically take 10 years or longer to develop and test for safety and effectiveness.