Many comparisons have been made between the current pandemic and the influenza outbreak of 1918. Despite being different viruses from different families, they both spread through the air and saw health experts urge people to take precautions to stop the spread. Most expected 2020 to be a difficult flu season on top of SARS-CoV-2. Instead, influenza has been unusually absent while the global count of COVID-19 cases has risen past 129 million.
There are a few theories about why it has disappeared, and the reason could have far-reaching implications for the lucrative market for the flu vaccine. Potential investors in producers like Sanofi (NASDAQ: SNY) and GlaxoSmithKline (NYSE: GSK), as well as some notable companies developing a preventative drug, should take note of the shift before buying shares.