what are two risk factors associated with COVD 19 outbreak, and the route of transmission?( who is at greater risk of contracting the virus) what is epidemiological determinant for COVID 19 ?.

what are  two risk factors associated with COVD 19 outbreak, and the route of transmission?( who is at greater risk of contracting the  virus) what is epidemiological determinant for COVID 19 ?.

 
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