These are the most frequently used words in this book.
abroad
advice
africa
against
air
although
always
areas
available
avoid
between
bites
blood
body
care
cases
cause
cent
children
common
conditions
contact
countries
days
diarrhoea
disease
dose
drug
during
effective
effects
especially
even
exposure
eye
fever
few
food
given
health
hepatitis
high
hours
however
human
illness
important
include
infected
infection
injury
less
likely
local
malaria
may
medical
mg
need
new
number
occur
often
particularly
parts
patients
people
per
person
possible
problems
protection
result
risk
see
serious
severe
should
skin
small
symptoms
tablets
take
temperature
three
time
travel
travellers
treatment
two
uk
use
used
usually
vaccine
virus
water
weeks
world
years