That headline is misleading. There isn’t one herb proven to simultaneously “destroy parasites,” cure urinary-tract/bladder infections, herpes, and flu viruses.
UTIs/bladder infections: Bacterial UTIs may require appropriate antibiotics. Untreated infections can spread to the kidneys.
Herpes: There is no herb proven to eliminate herpes viruses. Antiviral medicines such as acyclovir or valacyclovir can reduce symptoms and outbreaks.
Influenza: Antiviral medicines can be useful for certain people, particularly when started early. Herbs aren’t established substitutes.
Parasites: Treatment depends on the specific parasite; different infections require different medications.
Some herbs can interact with medicines or cause liver, kidney, or other toxicity, so “natural” doesn’t automatically mean safe.
If you tell me which herb the headline is referring to, I can check the evidence for that specific herb and explain whether the claims are legitimate.