Table 1.

Description of 4 cases of COVID-19.

Demographics	Co-morbidities	Vaccine	Onset of symptoms in relation to vaccination	Other vaccines	Type of IDP	Clinical presentation	CSF	NCS
Age: 51 Sex: Male Ethnicity: Caucasian	NSTEMI*2020	AZa	2 weeks post 1st dose	Influenza vaccine 8 weeks post influenza vaccination	GBSa	Nadir: at 2 weeks -lower back pain -Bifacial weakness -Dysphagia -Diplopia -Respiratory failure - Upper limb motor deficit - Progressive ascending lower limb sensorimotor deficit -Areflexia	Albuminocytologic dissociation Protein: 0.70 WCC: 0 RBC: 0 Viral panel: negative Culture: no growth	Absent ulnar and sural sensory reponses with slowed median sensory and motor NCV, prolonged distal motor latencies, absent F-waves.
Age: 65 Sex: Female Ethnicity: Caucasian	None	AZ	Onset: 1 week post 1st dose	Influenza vaccine 4 weeks post influenza vaccination	GBS	Nadir: at 2 weeks -Lower Back Pain -Dysphagia - Diplopia -Respiratory failure -Progressive ascending upper limb and lower limb sensorimotor deficit -Areflexia	Albuminocytologic dissociation Protein 2.51 g/L WCC: 5 RBS: 95 Viral panel - negative Culture – no growth	Absent upper limb sensory responses with sural sparing, prolonged distal latencies, reduced amplitudes with temporal dispersion, slowed motor NCV, absent F-waves
Age: 72 Sex: Male Ethnicity: Caucasian	Idiopathic neuropathy	AZ	Onset: 3 weeks post 1st dose	Influenza vaccine 6 weeks post influenza vaccination	CIDPa	Nadir: at 5 weeks -Lower back pain -Progressive ascending lower limb sensorimotor involvement -Upper limb motor deficit - areflexia	Albuminocytologic dissociation Protein: 0.55 WCC: 0 RBC: 0 Viral Panel: not tested Culture: no growth	Absent sensory responses, Prolonged distal motor, and F- minimum latencies, slowed motor NCV.
Age: 66 Sex: Male Ethnicity: Caucasian	Renal Cell Carcinoma Atrial Fibrillation Hypercholesterolemia	AZ	3 weeks post 1st dose	Influenza vaccine 8 weeks post influenza vaccine	GBS	Nadir at 4 weeks: -lower back pain -Progressive ascending sensorimotor involvement -proximal lower limb weakness -areflexia	Albuminocytologic dissociation Protein: 1.5 WCC 0 RBC 0 Culture: No growth Viral Panel: negative	Absent median sensory responses with sural sparing, absent peroneal and tibal motor responses, prolonged median distal motor, and F- minimum latencies with slowed motor NCV.

^aAZ = Oxford/AstraZeneca ChAdOx1 nCoV-19 COVID-19 vaccine, GBS = Guillain Barre Syndrome, CIDP = Chronic inflammatory demyelinating neuropathy, NCV = nerve conduction velocity.