COVID-19 vaccines under the International Health Regulations - We must use the WHO International Certificate of Vaccination or Prophylaxis
Petersen E
Lucey D
Blumberg L
Kramer LD
Al-Abri S
Lee SS
Pinto TCA
Obiero CW
Rodriguez-Morales AJ
Yapi R
Abubakar A
Tambyah PA
Holmes A
Chen LH Int J Infect Dis. 2021;104175-177