Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
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Question: original question: How many drug classes include [BCG vaccine]?
answer: 2
answer type: Drug class.
auxiliary information: A vaccine containing bacillus Calmette-Guerin (BCG), an attenuated strain of Mycobacterium bovis, with non-specific immunoadjuvant and immunotherapeutic activities. Although the mechanism of its anti-tumor activity is unclear, immunization with BCG vaccine likely activates a Th1 cytokine response that includes the induction of interferon. Vaccination with BCG vaccine may be immunoprotective against infection with Mycobacterium tuberculosis.

Answer: [BCG vaccine] contains how many drug classes?


Question: original question: Which venue is the exhibition of [Asian/American/Modern Art: Shifting Currents, 1900‚Äì1970] in?
answer: m. h. de young memorial museum
answer type: Exhibition venue.
auxiliary information: Asian | American | Modern Art: Shifting Currents, 19001970 presents the work of artists of Asian ancestry who lived and worked in the United States. Nearly 100 works by 60 artists are included.

Answer: The exhibition of [Asian/American/Modern Art: Shifting Currents, 1900‚Äì1970] is in which venue?


Question: original question: how many Infectious Disease where the Type of infectious agent is [Virus]?
answer: 80
answer type: Infectious Disease.
auxiliary information: A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, about 5,000 virus species have been described in detail, although there are millions of different types. Viruses are found in almost every ecosystem on Earth and are the most abundant type of biological entity. The study of viruses is known as virology, a sub-speciality of microbiology. While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles. These viral particles, also known as virions, consist of two or three parts: the genetic material made from either DNA or RNA, long molecules that carry genetic information; a protein coat that surrounds and protects the genetic material; and in some cases an envelope of lipids that surrounds the protein coat when they are outside a cell.

Answer:
How many infectious diseases have a [Virus] as the infectious agent?