Suppose that you began a one-year study of tuberculosis (TB) in a subsidized housing community in the Lower East Side of

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Suppose that you began a one-year study of tuberculosis(TB) in a subsidized housing community in the Lower East Side ofNew York City on January 1st, 2010. You enrolled 500 residents inyour study and checked on their TB status on a monthly basis. Atthe start of your study on January 1st, you screened all 500residents. Upon screening, you found that 20 of the healthyresidents were immigrants who were vaccinated for TB and so werenot at risk. Another 30 residents already had existing cases of TBon January 1st. On February 1st, 5 residents developed TB. On April1st, 5 more residents developed TB. On June 1st, 10 healthyresidents moved away from New York City were lost to follow-up. OnJuly 1st, 10 of the residents who had existing TB on January 1stdied from their disease. The study ended on December 31, 2010.Assume that once a person gets TB, they have it for the duration ofthe study, and assume that all remaining residents stayed healthyand were not lost to follow-up.
1. What type of cohort is the subsidized housingcommunity in the Lower East Side of New York City?