PubMed:
Provider: NLM
Database: PubMed (National Library of Medicine), https://pubmed.ncbi.nlm.nih.gov
Date(s) Searched: October 28, 2026
Final count: 521 (line 16)
Search Terms:

No. | Query | Results | Reported
1 | COVID-19[Majr] OR Post-Acute COVID-19 Syndrome[Majr] or "pediatric multisystem inflammatory disease, COVID-19 related" [Supplementary Concept] | 261,347 | 251,600
2 | "COVID 19"[ti] OR "SARS Coronavirus 2 Infection"[ti] OR "2019-nCoV Infection"[ti] OR "2019 nCoV Infection"[ti] OR "2019-nCoV Infections"[ti] OR "Infection 2019-nCoV"[ti] OR "SARS-CoV-2 Infection"[ti] OR "Infection SARS-CoV-2"[ti] OR "SARS CoV 2 Infection"[ti] OR "SARS-CoV-2 Infections"[ti] OR "2019 Novel Coronavirus Disease"[ti] OR "2019 Novel Coronavirus Infection"[ti] OR "2019-nCoV Disease"[ti] OR "2019 nCoV Disease"[ti] OR "Disease 2019-nCoV"[ti] OR "COVID19"[ti] OR "Coronavirus Disease 2019"[ti] OR "Severe Acute Respiratory Syndrome Coronavirus 2 Infection"[ti] OR "COVID-19 Virus Disease"[ti] OR "COVID 19 Virus Disease"[ti] OR "Virus Disease COVID-19"[ti] OR "Coronavirus Disease-19"[ti] OR "Coronavirus Disease 19"[ti] OR "COVID-19 Virus Infection"[ti] OR "COVID 19 Virus Infection"[ti] OR "COVID-19 Virus Infections"[ti] OR "Virus Infection COVID-19"[ti] | 327,215 | 317,902
3 | "Long COVID"[ti] OR "Long Haul COVID-19"[ti] OR "Long-Haul COVID"[ti] OR "Neuro PASC"[ti] OR "Post Acute COVID-19 Syndrome"[ti] OR "Post COVID-19 Syndrome"[ti] OR "Post-Acute COVID-19 Sequelae"[ti] OR "Post-Acute Sequelae SARS-CoV-2 Infection"[ti] OR "Post-COVID Conditions"[ti] OR "Post-COVID-19 Syndrome"[ti] | 6,056 | 5,629
4 | multisystem inflammatory syndrome in children[tw] | 2,313 | 2,249
5 | 1 or 2 or 3 or 4 | 413,144 | 399,700
6 | Cognition[Majr:noexp] OR Sensation[Majr:noexp] OR "Psychomotor Performance"[Mesh] OR "Attention"[Majr:noexp] OR "Memory"[Majr:noexp] OR "Deja Vu"[Mesh] OR "Memory, Episodic"[Mesh] OR "Memory, Long-Term"[Mesh] OR "Memory, Short-Term"[Mesh] OR "Mental Recall"[Mesh] OR "Recognition, Psychology"[Mesh] OR "Repetition Priming"[Mesh] OR "Retention, Psychology"[Mesh] OR "Spatial Memory"[Mesh] OR "Executive Function"[Mesh] OR "Clinical Reasoning"[Mesh] OR "Problem Solving"[Mesh] OR "Processing Speed"[Mesh] OR "Language Development"[Mesh] OR "Cognitive Dysfunction"[Mesh] OR "Neurodevelopment"[Mesh] OR "Neuropathology"[Mesh] or "Memory Disorders"[Mesh] or "Brain"[Mesh] or "Neurologic Manifestations"[Majr:noexp] | 1,821,497 | 1,652,543
7 | cognition[ti] OR "cognitive function"[ti] or sensation[ti] or "sensory function"[ti] or "sensory processing"[ti] or "psychomotor performance"[ti] or "sensory motor performance"[ti] or attention[ti] or "mental concentration"[ti] or memory[ti] or "immediate recall"[ti] or "mental recall"[ti] or "repetition priming"[ti] or "executive function"[ti] or "executive control"[ti] or "clinical reasoning"[ti] or "clinical judgement"[ti] or "problem solving"[ti] or "processing speed"[ti] or "language development"[ti] or "language acquisition"[ti] or "cognitive defect"[tiab] or "cognitive dysfunction"[tiab] or "cognitive impairment"[tiab] or neurodevelopment[ti] or neuropathology[ti] or neurocognitive[tiab] or brain[ti] or neurocognition[tiab] or "neurological symptom*"[tiab] or "neurologic disorder*"[tiab] or "neurological disorder*"[tiab] | 911,849 | 833,979
8 | cognition[ot] OR "cognitive function"[ot] or sensation[ot] or "sensory function"[ot] or "sensory processing"[ot] or "psychomotor performance"[ot] or "sensory motor performance"[ot] or attention[ot] or "mental concentration"[ot] or memory[ot] or "immediate recall"[ot] or "mental recall"[ot] or "psychological recognition"[ot] or "repetition priming"[ot] or "executive function"[ot] or "executive control"[ot] or "clinical reasoning"[ot] or "clinical judgement"[ot] or "problem solving"[ot] or "processing speed"[ot] or "language development"[ot] or "language acquisition"[ot] or "cognitive defect"[ot] or "cognitive dysfunction"[ot] or "cognitive impairment"[ot] or neurodevelopment[ot] or neuropathology[ot] or neurocognitive[ot] or brain[ot] or neurocognition[ot] or "neurological symptom*"[ot] or "neurologic disorder*"[ot] or "neurological disorder*"[ot] | 407,210 | 373,079
9 | 6 or 7 or 8 | 2,349,291 | 2,134,656
10 | "COVID-19 Vaccines"[Majr] OR "Vaccination"[Majr] OR "Breakthrough Infections"[Majr] OR "COVID-19 breakthrough infections" [Supplementary Concept] | 74,035 | 59,837
11 | "COVID 19 Vaccines"[ti] OR "Vaccines COVID-19"[ti] OR "Coronavirus Disease 2019 Vaccines"[ti] OR "Coronavirus Disease 2019 Vaccine"[ti] OR "Coronavirus Disease-19 Vaccines"[ti] OR "Coronavirus Disease 19 Vaccines"[ti] OR "Coronavirus Disease-19 Vaccine"[ti] OR "Coronavirus Disease 19 Vaccine"[ti] OR "COVID 19 Vaccine"[ti] OR "Vaccine COVID 19"[ti] OR "2019-nCoV Vaccine"[ti] OR "SARS-CoV-2 Vaccine"[ti] OR "SARS CoV 2 Vaccine"[ti] OR "Vaccine SARS-CoV-2"[ti] OR "COVID-19 Vaccine"[ti] OR "SARS Coronavirus 2 Vaccines"[ti] OR "Virus Vaccines COVID-19"[ti] OR "COVID19 Vaccine"[ti] OR "SARS-CoV-2 Vaccines"[ti] OR "SARS CoV 2 Vaccines"[ti] OR "Vaccines SARS-CoV-2"[ti] or vaccination[ti] or vaccination[ot] or "breakthrough infection*"[ti] or "breakthrough infection*"[ot] | 121,596 | 105,227
12 | 10 or 11 | 149,910 | 128,852
13 | 5 and 9 and 12 | 614 | 590
14 | "Comment" [Publication Type] or "Case Reports" [Publication Type] or "Conference Proceedings" [Publication Type] or "Editorial" [Publication Type] or "Preprint" [Publication Type] | 4,368,847 | 3,751,353
15 | 13 NOT 14 | 522 | 503
16 | Language: English | 521 | 503

Final query as run through NCBI E-utilities (line 16):
((((COVID-19[Majr] OR Post-Acute COVID-19 Syndrome[Majr] OR "pediatric multisystem inflammatory disease, COVID-19 related"[Supplementary Concept]) OR ("COVID 19"[ti] OR "SARS Coronavirus 2 Infection"[ti] OR "2019-nCoV Infection"[ti] OR "2019 nCoV Infection"[ti] OR "2019-nCoV Infections"[ti] OR "Infection 2019-nCoV"[ti] OR "SARS-CoV-2 Infection"[ti] OR "Infection SARS-CoV-2"[ti] OR "SARS CoV 2 Infection"[ti] OR "SARS-CoV-2 Infections"[ti] OR "2019 Novel Coronavirus Disease"[ti] OR "2019 Novel Coronavirus Infection"[ti] OR "2019-nCoV Disease"[ti] OR "2019 nCoV Disease"[ti] OR "Disease 2019-nCoV"[ti] OR "COVID19"[ti] OR "Coronavirus Disease 2019"[ti] OR "Severe Acute Respiratory Syndrome Coronavirus 2 Infection"[ti] OR "COVID-19 Virus Disease"[ti] OR "COVID 19 Virus Disease"[ti] OR "Virus Disease COVID-19"[ti] OR "Coronavirus Disease-19"[ti] OR "Coronavirus Disease 19"[ti] OR "COVID-19 Virus Infection"[ti] OR "COVID 19 Virus Infection"[ti] OR "COVID-19 Virus Infections"[ti] OR "Virus Infection COVID-19"[ti]) OR ("Long COVID"[ti] OR "Long Haul COVID-19"[ti] OR "Long-Haul COVID"[ti] OR "Neuro PASC"[ti] OR "Post Acute COVID-19 Syndrome"[ti] OR "Post COVID-19 Syndrome"[ti] OR "Post-Acute COVID-19 Sequelae"[ti] OR "Post-Acute Sequelae SARS-CoV-2 Infection"[ti] OR "Post-COVID Conditions"[ti] OR "Post-COVID-19 Syndrome"[ti]) OR (multisystem inflammatory syndrome in children[tw])) AND ((Cognition[Majr:noexp] OR Sensation[Majr:noexp] OR "Psychomotor Performance"[Mesh] OR "Attention"[Majr:noexp] OR "Memory"[Majr:noexp] OR "Deja Vu"[Mesh] OR "Memory, Episodic"[Mesh] OR "Memory, Long-Term"[Mesh] OR "Memory, Short-Term"[Mesh] OR "Mental Recall"[Mesh] OR "Recognition, Psychology"[Mesh] OR "Repetition Priming"[Mesh] OR "Retention, Psychology"[Mesh] OR "Spatial Memory"[Mesh] OR "Executive Function"[Mesh] OR "Clinical Reasoning"[Mesh] OR "Problem Solving"[Mesh] OR "Processing Speed"[Mesh] OR "Language Development"[Mesh] OR "Cognitive Dysfunction"[Mesh] OR "Neurodevelopment"[Mesh] OR "Neuropathology"[Mesh] OR "Memory Disorders"[Mesh] OR "Brain"[Mesh] OR "Neurologic Manifestations"[Majr:noexp]) OR (cognition[ti] OR "cognitive function"[ti] OR sensation[ti] OR "sensory function"[ti] OR "sensory processing"[ti] OR "psychomotor performance"[ti] OR "sensory motor performance"[ti] OR attention[ti] OR "mental concentration"[ti] OR memory[ti] OR "immediate recall"[ti] OR "mental recall"[ti] OR "repetition priming"[ti] OR "executive function"[ti] OR "executive control"[ti] OR "clinical reasoning"[ti] OR "clinical judgement"[ti] OR "problem solving"[ti] OR "processing speed"[ti] OR "language development"[ti] OR "language acquisition"[ti] OR "cognitive defect"[tiab] OR "cognitive dysfunction"[tiab] OR "cognitive impairment"[tiab] OR neurodevelopment[ti] OR neuropathology[ti] OR neurocognitive[tiab] OR brain[ti] OR neurocognition[tiab] OR "neurological symptom*"[tiab] OR "neurologic disorder*"[tiab] OR "neurological disorder*"[tiab]) OR (cognition[ot] OR "cognitive function"[ot] OR sensation[ot] OR "sensory function"[ot] OR "sensory processing"[ot] OR "psychomotor performance"[ot] OR "sensory motor performance"[ot] OR attention[ot] OR "mental concentration"[ot] OR memory[ot] OR "immediate recall"[ot] OR "mental recall"[ot] OR "psychological recognition"[ot] OR "repetition priming"[ot] OR "executive function"[ot] OR "executive control"[ot] OR "clinical reasoning"[ot] OR "clinical judgement"[ot] OR "problem solving"[ot] OR "processing speed"[ot] OR "language development"[ot] OR "language acquisition"[ot] OR "cognitive defect"[ot] OR "cognitive dysfunction"[ot] OR "cognitive impairment"[ot] OR neurodevelopment[ot] OR neuropathology[ot] OR neurocognitive[ot] OR brain[ot] OR neurocognition[ot] OR "neurological symptom*"[ot] OR "neurologic disorder*"[ot] OR "neurological disorder*"[ot])) AND (("COVID-19 Vaccines"[Majr] OR "Vaccination"[Majr] OR "Breakthrough Infections"[Majr] OR "COVID-19 breakthrough infections"[Supplementary Concept]) OR ("COVID 19 Vaccines"[ti] OR "Vaccines COVID-19"[ti] OR "Coronavirus Disease 2019 Vaccines"[ti] OR "Coronavirus Disease 2019 Vaccine"[ti] OR "Coronavirus Disease-19 Vaccines"[ti] OR "Coronavirus Disease 19 Vaccines"[ti] OR "Coronavirus Disease-19 Vaccine"[ti] OR "Coronavirus Disease 19 Vaccine"[ti] OR "COVID 19 Vaccine"[ti] OR "Vaccine COVID 19"[ti] OR "2019-nCoV Vaccine"[ti] OR "SARS-CoV-2 Vaccine"[ti] OR "SARS CoV 2 Vaccine"[ti] OR "Vaccine SARS-CoV-2"[ti] OR "COVID-19 Vaccine"[ti] OR "SARS Coronavirus 2 Vaccines"[ti] OR "Virus Vaccines COVID-19"[ti] OR "COVID19 Vaccine"[ti] OR "SARS-CoV-2 Vaccines"[ti] OR "SARS CoV 2 Vaccines"[ti] OR "Vaccines SARS-CoV-2"[ti] OR vaccination[ti] OR vaccination[ot] OR "breakthrough infection*"[ti] OR "breakthrough infection*"[ot]))) NOT ("Comment"[Publication Type] OR "Case Reports"[Publication Type] OR "Conference Proceedings"[Publication Type] OR "Editorial"[Publication Type] OR "Preprint"[Publication Type])) AND english[la]

AI-use statement:
No generative AI model was used: the strategy was supplied by the searcher and checked with the PICO search builder. Every MeSH heading, Supplementary Concept and publication type was looked up in NLM MeSH (id.nlm.nih.gov): 37 valid. Every line was run in PubMed through NCBI E-utilities on October 28, 2026, and its count compared with the count written in the strategy.

Run 298d14d5-46a1-4e26-a5ac-947b32f4c701, exported October 29, 2026 from the PICO search builder.