👉 The OG Flu, or "Old Flu," refers to a strain of influenza virus that first emerged in 2009 and caused a global pandemic. Characterized by its rapid spread and high transmissibility, the OG Flu virus is known for its ability to evade the immune system more effectively than previous flu strains, leading to widespread infections. Symptoms typically include fever, cough, sore throat, runny or stuffy nose, body aches, headache, and fatigue. The OG Flu's genetic variability and ability to undergo antigenic drift and shift contribute to its persistent threat, necessitating annual updates to flu vaccines to match circulating strains.
