Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has led to the coronavirus disease 2019 (COVID-19) pandemic, severely affecting public health and the global economy. Adaptive immunity plays a crucial role in fighting against SARS-CoV-2 infection and directly influences the clinical outcomes of patients.

Development of a Covid-19 vaccine in Australia was abandoned Friday after clinical trials produced a false positive HIV result among subjects involved in early-stage testing. The result prompted the government to axe plans to purchase millions of doses of the candidate vaccine and instead increase orders of alternatives from AstraZeneca and Novax, Prime Minister Scott Morrison said.

As epidemiologists try to stay ahead of the spread of new coronavirus COVID-19, vaccine developers, like Sanofi and Johnson & Johnson, are focusing on the "spike" proteins that festoon viral surfaces. Following clues in genomes is critical to disrupting the tango of infectivity as viruses meet and merge with our cells.

It's a feat three decades in the making: Harvard University chemists have achieved what a new paper calls a "landmark in drug discovery" with the total synthesis of halichondrin.