Spanish La Liga side Rayo Vallecano has been prohibited from playing at its home stadium, Campo de Fútbol de Vallecas, just weeks before the start of the new season due to the risk of supporters contracting Legionnaires' disease. The decision, which forces the club to find an alternative venue, stems from concerns over the stadium's water systems, which can harbor the Legionella bacteria that cause the severe form of pneumonia. The ban comes as a major disruption to the club's preparations for the upcoming campaign, with pre-season fixtures and the first league matches of the season affected. Rayo Vallecano, based in the Madrid district of Vallecas, now faces the urgent task of securing a temporary home ground, likely to be another stadium in the Madrid area. The Spanish football authorities and health officials have not yet specified the duration of the ban or the exact measures needed to eliminate the bacteria. Legionnaires' disease is contracted by inhaling contaminated water droplets, making large public venues like stadiums a potential risk if water systems are not properly maintained. The club has not publicly commented on the situation but is expected to work with health experts to resolve the issue as quickly as possible to minimize the impact on the season. Further details on alternative arrangements are anticipated in the coming days.