Hello! I am a rising sophomore with a major in microbiology. I wrote this post to seek out the advice from you in terms of double majoring with the mathematics. Although my primary interest is on the microbiology (especially the virology), I am also deeply interested in the fields of number theory and linear differential equations; since my interest also lies in the pure mathematics, I was thinking about doing double majors in both microbiology and mathematics. However, several of my research lab friends and upper-class students told me that the best mathematical program that correlates well with the microbiology is either an applied mathematics or a statistics. They discouraged me about majoring in a mathematics. Should I double majors in a microbiology and mathematics or statistics? My impression is that the applied mathematics is not hard to learn once I have the strong knowledge in a pure mathematics, since the applied math basically originates from the ideas of pure math (please correct me if I am wrong). Fore more information, I have been working in the virology lab that focuses on the mathematical modeling and genetic analysis of the influenza viruses and HIV; mathematical modeling requires a huge knowledge in a vector calculus, linear algebra, and geometry. I look forward to your advice!