With changing recommendations about AstraZeneca's COVID-19 vaccine making headlines, many people have questions about its use.
As the US vaccinates millions more people each day, the novel coronavirus works to survive. It does this by mutating. So far, several variants are worrisome. A virologist explains what they are.
The FDA has indicated booster shots, to cover coronavirus variants, won't need to go through lengthy phase 3 clinical trials. Instead, they can be tested in smaller trials, which will save time.
Moving Auckland to level 3 for a week gives health officials time to track down additional cases and shut off chains of transmission. But we should also be prepared for a wider outbreak.