Since below cites a precedent for expressing mass solidarity in others' situations beyond our help, my suggestion:
I don't know if all such stotras & shlokas to follow can be used to benefit Others, but if yes, those of Vaidika Maarga could recite them for Hs & Friendlies in Ind: https://twitter.com/BharadwajSpeaks/status/1385600150169559043

-Pls Don't retweet _This_ specific tweet as it may invite more Butshikanery & simultaneous inculturation on Hindu nAtya
-Can RT a diff tweet in this thread or DM vid to Hs

Hari mantra recommended by Acharyas for _All_Hs to recite:
achyutAya namaH
anantAya namaH
gOvindAya namaH

thaiyalnAyaki-samEta-vaidIshwaran shloka
to vaidyanAtha: Shiva the Physician.
In veda (Sri Rudram), Shiva is named bhiShak, the physician, also descr as vishvAhabheShajI "the medicine at all times".
ThaiyalnAyaki a.k.a BalAmbigai carries medicinal oil in hand. Thaiyal=sowing.

Longer stotra: VaidyanaathaaShTakam

sAhitya in several scripts in this & next 2 tweets (incl Tamil with superscripts to distinguish t from d & d from dh etc)

Vid 1: sung by bhaktas, Karnatak (southern Hindu classical)
with saahityam & meaning in Tamil

2. Vid: recited by a swAmi with sAhitya in Devanagari
With "shambho mahadeva" invocation interspersed

(Still vaidyanAthAShTakam saahityam)

With the shloka in next tweet the 1st vid ends up making sense, though I uploaded that vid (set to traditional Tamil Hindu folk music style) for the sheer joy it may give other bhaktas as it does me: may that Devi make the virus effortlessly impotent to Hs as she did the Asuras.

shloka: Hariharaputra
To that shAstA the storehouse of compassion, whose Mother is none other than Dhanvantari & father is Rudra the Supreme Bhishak himself. (So shAstA is a Physician from both Hari & Hara sides)
sAhitya: "rudro bhishak or "devo bhishak", both ref to Sri Rudram

If you feel helpless for others' suffering & unable to help Or want to (also) feel you're doing Something while self-isolating

pls recite any relevant shloka of Choice (e.g shivAnanda laharI 31&32) & ask for Hs&Friendlies to be beneficiaries as often as you wish/are able.

If nothing else, you'd have meditated on Devatas while giving expression to your spiritual solidarity (like the fasts earlier).
Meditation reduces depression, anxiety.

Additionally, in H view, many ppl invoking the Devatas for others' benefit can produce more noticeable results.