Recommended natural helps by REAL doctors against any influenza "virus" including Covid:

Vitamins, c, d, and zinc

Fish oil (omega 3)

And to protect against the spike proteins, a very cheap answer, 

Make yourself some dandelion tea from clean dandelion flowers, stems, leaves, and roots (the whole plant contains many good detox qualities), but it also has a specific extract that keeps the invading spike proteins ( that come from these poor vaccinated people now) from attaching to the ACE2 receptors of your own body's cells .  Pine needle tea also works in that regard but you have to be careful which types of pine trees as some are not edible.