Zambian presidential candidate ready to undergo medical tests after two previous presidents die in office

 

 Edgar Lungu (l) is Zambia's justice and defence minister and a frontrunner in the presidential election

Zambian presidential candidate Edgar Lungu is ready to take medical tests to show he is physically fit for office, his spokesman has told the BBC.

He said Mr Lungu, who is standing for the governing Patriotic Front (PF), "enjoys good health".
The spokesman said concerns about Mr Lungu's health had been raised by opponents as a "campaign tactic". 
Two Zambian presidents, Levy Mwanawasa and Michael Sata, have died in office in the past seven years.
Zambian voters will go to the polls on 20 January to elect a permanent successor to Mr Sata, who died in October last year.