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Table 1 Difficulty index of the knowledge items

From: Knowledge, attitudes and practices of Iranian people about food safety and hygiene during covid-19 pandemic

  questions difficulty index
1 The corona virus survives on skin, nasal mucosa and saliva 87.6%
2 Handwashing before cooking can be prevented the transmission of COVID-19 94.8%
3 Raw and cooked foods should be kept separate in the refrigerator 91.4%
4 The Corona virus does not survive in the freezer 20.4%
5 The corona virus inactivated at cooking temperature (above 60° C) 77.2%
6 The cutting board of raw and cooked food should be separated 87.1%
7 Corona virus transmits through eating food 50.7%