The Ministry of Public Health (MoPH) on Saturday issued advice to the community on how to protect themselves against the virus that causes dengue fever carried by certain types of mosquitos. The MoPH noted that the recent heavy rainfall in Qatar has contributed to an increase in mosquito breeding in the country. The dengue fever virus has become endemic in more than 100 countries worldwide. Residents should reduce their risk of being bitten by mosquitos, the MoPH said.