Early data from trials of three potential coronavirus vaccines released on Monday, including a closely-watched candidate from Oxford University, increased confidence that a vaccine can train the immune system to recognize and fight COVID-19 without serious side effects. Whether any of these efforts will result in a safe and effective vaccine capable of protecting billions of people and ending the global pandemic is still far from clear. All will require much larger studies to prove they can prevent infection with the virus. The vaccine being developed by British drugmaker AstraZeneca along with Oxford University, induced an immune response in all study participants who received two doses without any worrisome side effects. A coronavirus vaccine under development by CanSinoBiologics Inc and China’s military research unit, likewise showed that it appears to be safe and induced an immune response in most of the 508 healthy volunteers aged 18 […]