Tag Archives: Beta variant

How effective are vaccines against omicron? An epidemiologist answers 6 questions

Understanding how much protection a vaccine offers is not as simple as it sounds. Andriy Onufriyenko/Moment via Getty Images Melissa Hawkins, American University The pandemic has brought many tricky terms and ideas from epidemiology into everyone’s lives. Two particularly complicated concepts are vaccine efficacy and effectiveness. These are not the same thing. And as time goes on and new variants …

Read More »

Omicron: evidence shows it evades immunity from earlier infection more than other variants

South Africa is seeing a spike in COVID-19 cases. EMMANUEL CROSET/AFP via Getty Images Cari van Schalkwyk, South African Centre for Epidemiological Modelling & Analysis (SACEMA) ; Harry Moultrie, National Institute for Communicable Diseases, and Juliet Pulliam, South African Centre for Epidemiological Modelling & Analysis (SACEMA) Scientists are working around the clock to get a better understanding of the Omicron …

Read More »