Knowledge, attitudes, and behaviour of college students in disposing used masks during the COVID-19 pandemic in DKI Jakarta Province.

Background: The COVID-19 pandemic has increased the need for mask production which has caused the problem of mask waste generating in the environment without being managed. This research was conducted to determine the relationship between knowledge, attitudes, and sociodemographic factors with college student behaviours in managing household mask waste in Daerah Khusus Ibukota (DKI) Jakarta Province.

Methods: This study used a quantitative approach and cross-sectional study design.

The implementation of the five keys to safer food in campus cafeterias and the effects on contamination.

The World Health Organization developed five keys to safer food's guidelines. This study aimed to determine the relationships between food handlers' knowledge, attitudes, and behavior to the guideline and () contamination of food served at campus cafeterias. This cross-sectional study was carried out by interviewing 98 food handlers selling food and by testing samples for .

contamination of babies' food-serving utensils in a district of West Sumatra, Indonesia.

Background: Contamination of baby's complementary food may occur with Escherichia coli from several sources including unclean utensils. We examined the relationship between socio-economic conditions, environmental factors, characteristics of food handlers and contamination of babies food-serving utensils with E. coli.