I loved the cover of The Week magazine on March 26, 2021. On the cover, Uncle Sam had discarded his face masks as he gazed out the window at springtime’s arrival. His solemnity was overcome by a posture of dared hope. The title was: “The end is in sight.”

Businesses might again hold face to face meetings, we thought. School children might return to classrooms. Houses of worship might reopen.

Then the pace of vaccines faltered. About the same time, a new strain of Covid arrived.

Just as we had planned, finally, a return to normal holiday celebrations of families and friends, the virus numbers reversed and crept upward. The new strain of the virus spread. We heard more about “break-through” cases affecting even the vaccinated.

We returned to Zoom. Normal social gatherings were replaced by carry out meals. (Though some workers were unwilling to risk more exposure to the virus and undertake the necessary service jobs.)

What is our path out of this second invasion?

Though Covid sometimes breaks through and infects vaccinated individuals, the vaccinated (especially including those with booster shots) appear, on the whole, to be less seriously ill than the unvaccinated. Vaccination is more important than ever before.

Another lesson is the sharing of vaccines. As some predicted, the new strain of Covid broke through in a country with less access to them. We don’t stop after vaccinating our own citizens but push harder for sufficient vaccines for every country.

Past history indicates our ability to overcome infectious diseases, even in undeveloped countries. In the past, diseases like smallpox ravaged societies. Today, because of worldwide inoculation campaigns, small pox has been eradicated.

We have reason to hope for development of better vaccines against Covid, even while the current ones decrease Covid’s strength. As newer vaccines are found, developed countries must share them worldwide.

By practicing common sense and sharing, we can one day have that delayed celebration we looked forward to in spring 2021.