Greek authorities are on high alert following a surge in West Nile virus cases, particularly in the Attica region. The increase has prompted health officials to monitor the situation closely and issue guidance to the public. Symptoms of the virus can range from mild, flu-like illness to severe neurological conditions. Individuals over 50, and those with underlying health conditions, are considered to be at higher risk of developing serious illness. Public health campaigns are emphasizing preventative measures to avoid mosquito bites, the primary means of transmission. Citizens are urged to protect themselves and report any potential symptoms to their doctors promptly.