Staff at London's East End hospitals are working round the clock, to deal with the extra visitors from abroad.
The Royal London hospital has planned for an increase in patient numbers over the games.
Our Health Correspondent Liz Wickham has more.
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Stamp duty is to be abolished for first-time buyers on properties up to £300,000, Chancellor Philip Hammond has announced in his Budget.
The money will help pay for mental health and counselling services, regeneration in the west London neighbourhood and a new community space.
The small device was hidden in a grate in the ceiling in the only customer toilet at a Starbucks coffee shop.