Epidemiologist Thumbi Mwangi said the disease will not peak until herd immunity is achieved in the next three months.But this is dependent on whether the current containment measures are maintained.The expert from the Institute of Tropical Infectious Diseases at the University of Nairobi said Until 70 per cent of Kenyans have contracted the virus, then the disease will not have peaked.If the peak occurs in November, it will be a low peak, meaning that there will be less sick people at the same time, he said. But if the peak is sooner, it will be a high peak with many people infected at the same time.