The common black elderberry (Sambucus nigra) has long been used for flu symptoms. Elderberry extract binds to the tiny spikes on a virus protein that are used to pierce and invade healthy cells and destroys them so that the virus is ineffective.

ECHINACEA

The herb Echinacea (Echinacea purpurea) is supportive of the immune system and has a direct anti-viral action against colds and viral bronchitis. Preparations that include both the roots and the flowering tops are the most effective at helping the body resist the viruses.

GARLIC

Garlic has been prized for its medicinal properties for thousands of years. The compounds allicin and alliion are responsible for this common plant’s reputation as a triple threat. Garlic is anti-viral, anti-bacterial and anti-fungal and it is especially effective against viruses if chewed raw.

GREEN TEA

Green tea (Camellia sinensis) contains a group of flavonoids called catechins, which appear to inhibit viral infections by blocking the enzymes that allow it to reproduce. Green tea has been known to be effective in inhibiting HIV, herpes simples and the hepatitis B virus.

LIQORICE

Liquorice contains a substance called glycyrrhizin that reduces the replication of viruses and halts their ability to penetrate replicate inside healthy cells.

OLIVE LEAF

The leaves of Olive trees (Olea europea) contain a substances called elenoic acid and calcium elonate has been identified as a powerful inhibitor of a wide range of viruses in laboratory tests., including influenza, herpes, polio and coxsackie viruses. These substances block the production of enzymes that allow viruses to replicate.

PAU D’ARCO

Pau d’arco (Tabebuia impetiginosa), also known as lapacho or ipe roxo, is an Amazon tree with healing inner bark that can treat colds, influenza, herpes and viral stomatis. It contains quinoids that inhibit virus replication by damaging the DNA and RNA inside the viral protein that would insert itself in a healthy human cell and replicate.

ST JOHN’S WORT

St John’s Wort (Hypericum perforatum) is ore well-known for its ability to treat depression and neuralgia but it also has potent antiviral chemicals called hypercin and pseudohypericin that proactively fight off viruses that thrive by imitating existing cells through “cloaking”.

Another suggestion for boosting your immunity.
This is a list of western herbs for Tonifying Lung Qi
Wild Cherry Bark
Coltsfoot Leaf
Comfrey
Hyssop
Marshmallow Leaf
Peppermint
Yarrow
Available pre-mixed as ‘Lung Tea’ from Oxford Medical Supplies