Chakwera and Biya used very different approaches to tackle the rumours about illnesses, but they had a similar intent – to project, and protect, an image of strength and virility.
But perhaps most importantly, to keep rivals and opportunists at bay.
Prof Tendi says that the game of politics is a “performance of masculinity” that needs to be done to maintain power.
He adds that the masculine nature of politics makes it extremely difficult for women to succeed. There is currently only one female head of state in Africa, Samia Suluhu Hassan in Tanzania, and she inherited power as the deputy leader when her male boss died.
Political leaders, in Africa and beyond, are expected to be symbols of strength and resilience.
So, especially when the leader is ageing, their health becomes a highly sensitive matter of huge national importance, as we have seen in the US elections this year.
University of Johannesburg professor Adekeye Adebajo said leaders on the continent “give the impression that the health of their countries is tied to their own personal health”, and what is ailing a leader is often treated as a state secret.
If something happens to them, it can affect the economy, the markets and alter the political landscape, a security expert from Zimbabwe told the BBC, and this is why extra precautions are taken.
In countries where the political institutions are weak, procedures for political succession are often not well established, leading to fears that any leadership vacuum could lead to a power-struggle.
Over two decades ago, the Democratic Republic of Congo President Laurent-Désiré Kabila was assassinated by one of his bodyguards.
The authorities refused to admit that he had been killed, maintaining the pretence that he had been sent to Zimbabwe for medical treatment, while they worked out what to do next.
In fact, it was his dead body that was flown across the continent in an elaborate charade.
His inexperienced son, Joseph, was eventually chosen as the country’s next leader.
In Malawi, the government delayed the announcement of President Bingu wa Mutharika’s death in 2012, sparking speculation that there was an effort to prevent the succession of his Vice-President Joyce Banda.
But in neighbouring Zambia, where two presidents have died in office, and in Ghana, where then President John Atta Mills died in 2012, the constitutional processes worked smoothly.
Over the years, various African leaders have met questions about their ailing health with either silence or anger.
In 2010, Zimbabwe’s former leader Robert Mugabe slammed years of speculation as “naked lies crafted by the Western-manipulated media”.
Three years ago, the announcement that Tanzania’s President John Magufuli had died came after weeks of denial that he was sick. People were even arrested for spreading false information about his health, only for them to be ultimately proven right.
