Is there any advice in the Buddhist scriptures that would help a leader balance a safe economy with people's concerns about sickness & death? Is there advice in the various Buddhist scriptures that a leader
could use in this Coronavirus situation?
Is there advice in the Buddhist scriptures that a lay-person could
use in this Coronavirus situation?
What are Buddhist leaders doing about this Coronavirus situation?
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 principle as your flag, banner, and
authority — provide just protection and security for your court,
troops, aristocrats, vassals, brahmins and householders, people of
town and country, ascetics and brahmins, beasts and birds. Do not let
injustice prevail in the realm. Pay money to the penniless in the
realm.


The lay Buddhist should play the role of a good patient and heed the advice of competent authorities.

From Kucchivikara-vatthu of the Vinaya, the Buddha taught:

&quot;A sick person endowed with five qualities is easy to tend to: he does
what is amenable to his cure; he knows the proper amount in things
amenable to his cure; he takes his medicine; he tells his symptoms, as
they actually are present, to the nurse desiring his welfare, saying
that they are worse when they are worse, improving when they are
improving, or remaining the same when they are remaining the same; and
he is the type who can endure bodily feelings that are painful,
fierce, sharp, wracking, repellent, disagreeable, life-threatening. A
sick person endowed with these five qualities is easy to tend to.


Buddhist leaders should set a good example as the Dalai Lama had done (from this article).


The exiled Tibetan spiritual leader His Holiness the Dalai Lama has
received his second dose of the Covishield vaccine at his residence on
Monday, according to CTA run Tibet.net. He received the first jab on
March 6 at Zonal hospital in Dharamshala.
“The vaccine was administered by a medical team of Delek hospital led
by Dr Tseten Dorjee, personal physician to His Holiness,” Tibet.net
reported. The entire staff and security details of His Holiness,
including those living in the residence, were also vaccinated, the
report further stated. ...
The Nobel laureate wrote that he has been following the alarming news
of the pandemic across the world, especially including in India. “May
I take this opportunity to express my deep appreciation for all the
efforts that are being made to tackle this devastating pandemic,
especially by those courageously working on the frontline. I pray that
the pandemic threat will end soon,” he wrote. ...
The Dalai Lama cancelled all his public engagements since February
last year and engaged with the pubic through virtual platform for
teachings and other interactive dialogues with students, Buddhist
followers, and various organizations from all across the world. The
Buddhist leader’s only public appearance since the lockdown was during
his first Covishied jab at the local hospital last month, where he
urged others to take the injection, “I want to share that more people
should have the courage to take this injection.”