C1053 Eternally Prevent Future Troubles

Oman said with a cold face, "Feng Yixiu, is it strange that you were poisoned?"

Feng Yixiu slowly raised his head and his brain began to work at a high speed. Suddenly, he had a flash of inspiration and said slowly, "Toxic smog?"

Other than absorbing the toxic smog, he seemed to have no other way of being poisoned. However, why did he not have any reaction just now