Yes, Cordyceps has been proven to have anti-viral properties. One study found that a Cordyceps sinensis extract was effective against influenza A in vitro. The extract appeared to inhibit the replication of the virus by interfering with its ability to attach to cells. Another study found that Cordyceps militaris may have potential as an antiviral agent against human respiratory syncytial virus (RSV), a common cause of respiratory illness in young children.
Honestly the fact that there is any effect at all is pretty incredible. Add this on top the well documented benefits of cordyceps for strengthening the immune system and it’s a no brainer that you might was well add this function fungi to your supplement regimen.
Cordyceps is a genus of fungi that includes many species of parasitic mushrooms. These fungi grow on various insects and other arthropods, and are especially common in caterpillars of moths and butterflies. Some cordyceps species are used in traditional Chinese medicine, and there is some evidence to suggest that they may have medicinal properties, including antiviral and anti-fungal activity.
Overall, the evidence suggests that cordyceps may have antiviral activity against some viruses, but more research is needed to confirm this and to determine which viruses are most susceptible.