US health officials announce more cyclospora infections. People ingested unsafe iceberg lettuce. The parasite stays on the greens despite washing. Symptoms include watery diarrhoea, stomach cramps and exhaustion. Some cases persist weeks. New cases are popping up in multiple states. The CDC and FDA say discard any risky lettuce now. Skip raw salads with iceberg lettuce for now. Restaurants must pull it from menus without delay.