To avoid the worst worries of the latter, it is advisable to wash fruits and vegetables and to bring anti diarrhea medication for when these precautions fail. A good barrier suntan lotion is essential for protection against sunburn. Drinking plenty of fluids, keeping up salt intake to avoid dehydration and wearing a hat against the sun are advisable. Mosquitoes can sometimes be a problem during the summer. To avoid getting bitten, take a mosquito repellent with you especially if you intend to sleep or camp near the beach.
Tap water is safe to drink throughout the country.
One should always be able to get the locally produced mineral water. It is inadvisable to drink from wells or streams unless they are clearly marked as safe to drink. Christian owned businesses concentrated in Jerusalem Old City close on Sunday. As for Muslim areas such as East Jerusalem, Gaza strip and the West Bank towns, they remain open on Saturday but are generally closed all day Friday. On Shabbat, most Israeli shops, offices and places of entertainment close down.