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Is there an obligation to install screens on windows or use mosquito nets when there's a known health threat, or can one rely on the fact that most mosquitoes don't actually carry the disease? This relates to the concept of rov - following the majority - in matters of safek pikuach nefesh.
Asked on October 10, 2026
Answer
Audio Answer
When it comes to pikuach nefesh, we do not rely on rov (majority). Even a minimal risk (e.g., 1%) of life-threatening disease from mosquitoes necessitates preventative measures like screens and nets. This is a halachic obligation to guard life; do not gamble with statistics when simple prevention is available.