53101
Many scholars arguing for " Y. pestis " as the major agent of the pandemic suggest that its extent and symptoms can be explained by a combination of bubonic plague with other diseases , including typhus , smallpox and respiratory infections .
 typhus, smallpox, respiratory infections
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 typhus, smallpox, respiratory infections