Vaccine trials 'can't detect' virus risk reduction, says researcherThe World Health Organization (WHO) has identified 42 candidate vaccines in clinical trials, ten of which are in the most advanced "phase 3" stage. PARIS: None of the trials of Covid-19 candidate vaccines can detect a reduction in serious outcomes such as hospitalisation or death, a leading public health expert said on Thursday. "None of the trials currently under way are designed to detect a reduction in any serious outcome such as hospital admissions, use of intensive care, or deaths," he wrote. The World Health Organization (WHO) has identified 42 candidate vaccines in clinical trials, ten of which are in the most advanced "phase 3" stage. He said that several pharmaceutical firms had designed their studies "to detect a relative risk reduction of at least 30 percent in participants developing laboratory confirmed Covid-19".

Source: Bangkok Post October 22, 2020 00:48 UTC