You need a new shot every year because current flu vaccines provide limited and temporary protection. But researchers' new strategy could mean a one-and-done influenza vaccine is on the way.
There's no scientific definition for a wave of disease – and no evidence that the original onslaught of coronavirus in the US has receded much at all.
Winter is flu season – could it be coronavirus season as well? The research is mixed, but other factors besides temperature and humidity have more to do with the spread of SARS-CoV-2.
When it comes to flu, information can range from confusion about what it actually is, to speculation about how it's transmitted.
One of the biggest recent controversies in medicine involves the effectiveness of the antiviral drug Tamiflu. Governments have stockpiled the drug but many have raised doubts about its usefulness.