After having stored a cache of newly-received influenza samples, and transferring them to cold-storage, (see PHIL 22151 – 22155), this Centers for Disease Control and Prevention (CDC) scientist is shown here walking down one of the hallways in the Influenza Division’s laboratory facility, which is lined with other specimen freezers.
Influenza (flu) viruses change constantly. As a WHO Collaborating Center for Influenza (WHO CC) and the U.S. National Influenza Center, CDC monitors flu activity nationally and globally with other labs, looking for changes in circulating viruses. CDC monitors flu viruses because changes can impact the effectiveness of flu vaccine. When circulating viruses are substantially different from those in the vaccine, vaccine effectiveness can be reduced. If it looks like viruses are starting to change in specific ways (which can impact how well the vaccine works), this can trigger health authorities to recommend different viruses for vaccine production.
Please visit the link below for more information about Influenza (Flu).