I feel good reading this news

 The rash I observed after the first dose of Moderna seems to indicate the vaccine is actually working.

‘COVID Arm’ Rash After Vaccine Is Actually Proof It’s Working, Doctors Say (msn.com)

Delayed Large Local Reactions to mRNA-1273 Vaccine against SARS-CoV-2 | NEJM

Source: Delayed Large Local Reactions to mRNA-1273 Vaccine against SARS-CoV-2 | NEJM

This picture had a title. It is reproduced here:

"Shown are morphologic characteristics of delayed cutaneous reactions to mRNA-1273 vaccine, including annular plaques (in Patient 1), uniformly edematous plaques (in Patients 2, 6, and 11), and targetoid plaques (in Patient 3) near the site of vaccination. In several patients, there was considerable induration of the plaques (e.g., in Patients 8 and 9). In addition to a localized rash on the arm, two patients had other cutaneous symptoms, including papules on the palm and fingers (Patient 5) and urticarial plaques on the elbows (Patient 6). Patients 1, 5, 8, 9, 11, and 12 did not have a recurrence of large local reactions with the second dose, although some patients had minimal erythema. In Patients 2, 6, and 7, the reactions had an earlier onset and were lower grade after the second dose than after the first dose. In Patients 3, 4, and 10, the onset of the reactions after the second dose was earlier than after the first dose, but the reactions to the two doses were of a similar grade. Some photographs were taken by the patients using a mirror, so the images of the left and right arms may be transposed."

More here:

https://www.nejm.org/doi/full/10.1056/NEJMc2102131?query=featured_coronavirus