US doctor explains how influenza patients can spread the virus for over seven days

Influenza patients can spread the virus for over seven days, according to a US doctor, signaling a potential surge in infections. Most people are contagious for up to a week after symptoms appear, though children and those with weakened immune systems may shed the virus longer. Antiviral medications and vaccination can shorten this period. The CDC notes that the typical flu season runs from October to April, peaking between December and February.