[gautamnarula]

The parent link has a link to a list of papers[1] that answer this question in the affirmative:

For example, "Professional and Home-Made Face Masks Reduce Exposure to Respiratory Infections among the General Population" [2]

It's also worth noting that many people with COVID-19 are asymptomatic, so wearing a mask, even a homemade one, could reduce the spread to other healthy people.

[1] https://docs.google.com/document/d/1HLrm0pqBN_5bdyysOeoOBX4p...

[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2440799/