AkshayDhole14

#multistage sampling #stratified sampling #systmatic sampling #cluster sampling #simple random sampling #sampling types #probability sampling #purpose of sampling #sampling frame #population #sample #types of sampling #sampling disinfection notification quarantine isolation sentinal surveillence secondary surveillence primary surveillance chemoprophalxis public health breaking the chain of infectio chain of infection concept of conrtol disease erridication disease elimination disease control disease control measure