The substances tested were garlic, honey, tea tree oil, oregano oil, thyme oil, olive leaf extract, wintergreen oil, and lemon oil. 
The most effective were 
Tea tree oil, Oregano oil, Thyme oil, Wintergreen oil, and Lemon oil. 

Oregano oil was determined to have the greatest antimicrobial activity with a mean minimum inhibitory concentration (MIC) of 0.56 (%v/v) followed by thyme oil with a mean MIC of 2.47 (%v/v).

Another natural anti-biotic Olive leaf Extract has been used in hospitals in Hungary to overcome MRSA with good success rates.  Olive leaf extract has been used as a natural antibiotic for thousands of years; when the active components were isolated in 1969, an upsurge of research has resulted in dramatic discoveries.  Research at the Upjohn Company, published by the American Society for Microbiology, found that the active components in Olive Leaf - elenol acid and calcium elenolate, inhibited the growth of every virus, bacteria, fungi and protozoa they were tested against. 

 Oxyboost could be used at a rate of one teaspoon every 6 hours. This is a very powerful treatment that is likely to cause most people to feel extremely "hyper", so we would only recommend this in severe, life-threatening cases and only for short periods of time. Lower doses for short to medium to long term use are likely to be helpful.

MRSA: Black seed has anti-bacterial activity against clinical isolates of methicillin resistant Staphylococcus aureus.
Poisonous Virus: Take one glass warm water, add one spoon date ( Khajur) powder, half tea spoon Black Seed Oil and two spoons honey, mix together and use thrice a day. Treatment may continue for forty days. Avoid potato, brinjal grams, pulses ( Chana ki dal & Masoor ki dal)

Prevents Radiation Damage: Nigella sativa oil (NSO) and its active component,thymoquinone, protect brain tissue from radiation-induced nitrosative stress.