"Both Epidemic and Pandemic refers to the spread of infectious diseases among a population. The term pandemic indicates a far higher number of people affected in much larger geographical area than epidemic. Mortality rate is number of deaths per 1000 individuals per year. Genus epidemicus means that the treatment protocol of an epidemic disease is designed based on the collected signs and symptoms of a large group of patients in the same geographical area.
Homeopathy has been a boon to the patients of scarlet fever, typhus fever, yellow fever, Pneumonia, Cholera, Influenza, Hepatitis, Dengue, Leptospirosis and Conjunctivitis during the times of pandemics and epidemics.
Homeopathy has always served people in epidemics and pandemics crisis, in old times and modern times.
EPIDEMICS AND PANDEMICS BETWEEN 1799 AND 1918
 In the year 1852, Dr. Routh, a British allopathic physician and an opponent of homeopathy, was a designated authority by medical officials of London to release the mortality-statistics (for all diseases). As a result of his findings, Dr. Routh was constrained to testify in favor of homeopathy. He collected statistics of different hospitals (England, Austria and Germany), total of 32,655 homeopathic cases and 119,630 allopathic cases. The overall mortality under homeopathic treatment was 4.4 percent, and the overall mortality under allopathic treatment was 10.5 percent.
Another event in that age, is from Sir William Wilde, the well-known allopathic doctor of Dublin, which in his work entitled “Austria and its Institutions”, wrote: “Upon comparing the report of the treatment of Cholera in the Homeopathic hospital testified to by two allopathic medical inspectors appointed by Government with that of the treatment of the same disease in the other hospitals of Vienna during the same period the epidemic of 1836, it appeared that while two-thirds of the cases treated by Dr. Fleischmann the physician of the Homeopathic hospital, recovered, two-thirds of those treated by the ordinary methods in the other hospitals died.”
***In 1918 Spanish Flu pandemic, a physician in a Pittsburgh hospital in U.S. asked a nurse if she knew anything better than what he was doing, because he was losing many cases. “Yes Doctor, stop aspirin and go down to a Homeopathic pharmacy, and get homeopathic remedies.” The Doctor replied: “but that is homeopathy.” “I know it, but the homeopathic doctors for whom I have nursed have not lost a single case.” 
EPIDEMICS IN CUBA BETWEEN 2004 AND 2010
From Spanish Flu of 1918, let us forward the time to 2010, release of several outstanding reports in epidemiologic surveillance studies conducted by the Finlay Institute, a vaccines producer in Cuba. According to Finlay Institute, between December 2009 and January 2010, about 9,074439 individuals, near 90% of Cuban population received homeopathic preventive medicine (Homeoprophylaxis) for respiratory diseases, influenza (including AH1N1) with remarkable outcomes and a great reduction rate in mortality. Homeopathic interventions were also employed in other diseases in Cuba such as Hepatitis A (population 1400000, year 2004-2007), Dengue (population 150000, year 2006-2009), Leptospirosis  (population 2300000, year 2007-2008), Conjunctivitis (population 180000, year 2008-2009) with undeniable successful results from homeopathic treatment."