I have three years of undergrad left and will apply to med schools when the application season opens my last year. I have some questions about shadowing. I will start will start a volunteering position this fall and keeping doing it (once per week) for at least one academic year and then maybe continue here and there. I want to apply to both DO and MD schools, and several DO schools require a letter from an MD or DO. Do most people shadow long term (like once a week for a certain time). Can anyone share about their duration of shadowing?