Is 'gain' correctly used in the sentence? Can I use 'tuberculosis and HIV/AIDS prevention' and 'prevention of tuberculosis and HIV/AIDS' interchangeably?
Dr. Cruise has helped Molly and Beth gain a thorough understanding of (tuberculosis and HIV/AIDS prevention, prevention of tuberculosis and HIV/AIDS).
Dr. Cruise has helped Molly and Beth gain a thorough understanding of how to prevent the spread of tuberculosis and HIV/AIDS. Dr.
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Dr. Cruise has helped Molly and Beth gain a thorough understanding of how to prevent the spread of tuberculosis and HIV/AIDS.
Dr. Cruise has helped Molly and Beth gain a thorough understanding of preventative measures that can be taken against (the spread of ) tuberculosis and HIV/AIDS.