Patient observation and painstaking research over many centuries have revealed that the culprits were often small creatures that live alongside us.
ಮಾತ್ರವಲ್ಲ ಕೇವಲ ನೈರ್ಮಲ್ಯದ ಕೊರತೆಯಿಂದಲೂ ಜನರು ಸೋಂಕುರೋಗಗಳಿಗೆ ಆಹ್ವಾನವೀಯುತ್ತಾರೆ ಎಂದು ಸಹ ತಿಳಿದುಬಂತು.