Table 5 Summary of results from volunteers who tested negative on the rapid antigen test (RAD) and were sniffed by the sniffer dogs in the field work, grouped based on being sniffed by a single dog (one) or multiple dogs (multiple).

From: Sniffer dogs performance is stable over time in detecting COVID-19 positive samples and agrees with the rapid antigen test in the field

Number of sniffer dogs examining each volunteer

Dog

Correct choice rates

One

NALA

n. correct choices/total negative = 100% (2/2)

n. incorrect choices/total negative = 0% (0/2)

One

HOPE

n. correct choices/total negative = 95% (20/21)

n. incorrect choices/total negative = 5% (1/21)

One

NIM

n. correct choices/total negative = 100% (7/7)

n. incorrect choices/total negative = 0% (0/7)

One

CHAOS

n. correct choices/total negative = 100% (1/1)

n. incorrect choices/total negative = 0% (0/1)

Volunteer code

Number of sniffer dogs examining each volunteer

Correct sniffer dog

dqa

Multiple

NALA

IRIS

NIM

CHAOS

HOPE

dalb

Multiple

NALA

HOPE

fnifu

Multiple

NALA

HOPE

fnifd

Multiple

NALA

HOPE

drev

Multiple

HOPE

IRIS

NIM

CHAOS

dce

Multiple

NIM

NALA

HOPE

dpl

Multiple

NALA

HOPE

NIM

fnirzo2

Multiple

HOPE

NALA

fnirza

Multiple

NALA

HOPE

dgr

Multiple

IRIS

CHAOS

dmr

Multiple

IRIS

CHAOS

dcg

Multiple

IRIS

CHAOS

dsa

Multiple

IRIS

CHAOS

fnid3

Multiple

NALA

HOPE

fnid4

Multiple

NALA

HOPE

Fnim

Multiple

NIM

HOPE

fnid11

Multiple

HOPE

NIM

Ftu

Multiple

NALA

HOPE

dpa

Multiple

NALA

HOPE

NIM

fmabno2

Multiple

HOPE

IRIS

fmad

Multiple

HOPE

IRIS

fmanza2

Multiple

HOPE

IRIS

fmanzo2

Multiple

HOPE

IRIS

fmarzo

Multiple

HOPE

IRIS

fnid

Multiple

NALA

HOPE

fnirza2

Multiple

NALA

HOPE

ftrzo

Multiple

NALA

HOPE

  1. Name of sniffer dogs with wrong choices are in bold.