US health officials announce rising cyclospora infections. People consumed tainted iceberg lettuce. The parasite clings on the greens despite washing. Symptoms cover watery diarrhoea, stomach cramps plus exhaustion. Some cases persist weeks. New cases are appearing in multiple states. The CDC and FDA say discard any risky lettuce now. Stay away from raw salads with iceberg lettuce for now. Restaurants must remove it from menus at once.