Buddha taught to examine the cost (ādīnava) vs benefit (assāda) of worldly things. It follows world leaders must examine the benefits of their Covid measures (eg here) versus the damaging consequences (eg here or here or here or here) of their Covid measures.
As for Buddhist leaders, most would be engaged in the passive political correctness most Buddhist ...
What do you think, great king? Suppose a man, trustworthy and
reliable, were to come to you from the east and on arrival would say:
'If it please your majesty, you should know that I come from the east.
There I saw a great mountain, as high as the clouds, coming this way,
crushing all living beings [in its path]. Do whatever you think should
be done.' Then a ...
The government and leaders should provide just protection and security to its citizens. Basically, they should undertake the right measures to take care of their people.
From DN 26:
‘But sire, what are the noble duties of a wheel-turning monarch?’
‘Well then, my dear, relying only on principle—honoring, respecting,
and venerating principle, having ...
Please read "Ministering to the Sick and the Terminally Ill" by Lily de Silva.
All teachings from the suttas related to this topic are summarized in this essay.
Here's a quote from it.
The Sotapattisamyutta contains a valuable discourse on the question of
counseling the terminally ill (S.v,408). Once Mahanama the Sakyan
inquired from the Buddha ...