Results from trials involving three different coronavirus vaccines released Monday, all showing positive results, with evidence the vaccines can produce immune responses that would be expected to protect people against infection.
They all also appeared to be safe, although it will take studies with more people to show how safe they really are and whether they can prevent infection.
Early results of a closely watched Phase 1/2 trial published in The Lancet suggest a coronavirus vaccine developed by the University of Oxford and AstraZeneca is safe and induces an immune response. However, researchers stressed more study is needed to know whether the vaccine protects people against the virus.
Phase 2 results for one vaccine candidate made by Chinese company CanSino Biologics were also published in the medical journal The Lancet and early results from Phase 1/2 trials of the vaccine made by Pfizer and BioNTech were released in a pre-print paper that has not yet been peer-reviewed.
The Oxford vaccine prompted an antibody response within 28 days and a T-cell response within 14 days, according to the results published Monday. Neutralizing antibodies – so-called be