Novavax begins participant crossover in two COVID-19 vaccine trials: April 5 (Reuters) – Novavax Inc on Monday said it had begun to crossover patients in its ongoing COVID-19 vaccine trials in South Africa and the UK to ensure participants who previously received ... Source: "South Africa" - BingNews Novavax Initiates COVID-19 Vaccine Clinical Trial Crossover: Crossover … [Read more...] about SA News: Novavax begins participant crossover in two COVID-19 vaccine trials