AFP	Acute Flaccid Paralysis
aVDPV	Ambiguous Vaccine-Derived Poliovirus
aVDPV2	Ambiguous Vaccine-Derived Poliovirus type 2
bOPV	Bivalent Oral Poliovirus Vaccine (Sabin strain types 1 and 3)
CBV	Community-Based Vaccination (Pakistan)
COVID-19	Coronavirus Disease 2019 due to SARS-CoV-2
cVDPV	Circulating Vaccine-Derived Poliovirus
cVDPV1	Circulating Vaccine-Derived Poliovirus type 1
cVDPV2	Circulating Vaccine-Derived Poliovirus type 2
cVDPV3	Circulating Vaccine-Derived Poliovirus type 3
cVPDV2-n	Circulating Vaccine-Derived Poliovirus type 2 emergence from nOPV2
DG	Director-General of the World Health Organization
DRC	Democratic Republic of the Congo
EOC	Emergency Operations Centre
ES	Environmental Surveillance
GPEI	Global Polio Eradication Initiative
IDP	Internally Displaced Person
IMB	Independent Monitoring Board (for GPEI)
IPV	Inactivated Poliovirus Vaccine (type 1, 2 and 3 antigens)
IQR	Interquartile Range
ISIS	Islamic State of Iraq and ash-Sham
KP	Khyber Pakhtunkhwa (Pakistan Province)
LQAS	Lot Quality Assurance Sampling (Survey)
mOPV1	Monovalent Sabin Strain Poliovirus type 1
mOPV2	Monovalent Sabin Strain Poliovirus type 2
mOPV3	Monovalent Sabin Strain Poliovirus type 3
NEOC	National Emergency Operations Centre (Pakistan)
nOPV2	Novel Oral Poliovirus type 2
OPV	Oral Poliovirus Vaccine
OPV2	Oral Poliovirus Vaccine type 2
PHEIC	Public Health Emergency of International Concern (International Health Regulations, 2005)
PV	Poliovirus
PV1	Poliovirus type 1
PV2	Poliovirus type 2
PV3	Poliovirus type 3
RI	Routine Immunization (Essential Immunization Services)
SAGE	Strategic Advisory Group of Experts on immunization (advising WHO on immunization policy)
SIAs	Supplementary Immunization Activities
tOPV	Trivalent Oral Poliovirus Vaccine (Sabin Strain types 1, 2 and 3)
UNICEF	United Nations Children’s Fund (formerly; now simply UNICEF)
UC	Union Council (Pakistan)
VDPV	Vaccine-Derived Poliovirus
VP1	Viral Protein 1 (Poliovirus Capsid Surface Protein)
WHO	World Health Organization
WPV	Wild Poliovirus
WPV1	Wild Poliovirus type 1
WPV3	Wild Poliovirus type 3