What vaccines do dogs need? What do two, four, and six vaccines mean?

What vaccines should be given to dogs?
Diseases prevented by dog vaccines
Dog vaccines mainly prevent two diseases, one is infectious diseases and the other is rabies.
Currently, imported vaccines are commonly used in China, and common brands include Dutch Intervet and American Pfizer.
Interwin
Double vaccine: prevents canine distemper and parvovirus.
Quadruple vaccine: prevents canine distemper, parvovirus, infectious hepatitis, canine parainfluenza, and canine adenovirus.
Six-combination vaccine: prevents two types of canine distemper, parvovirus, infectious hepatitis, canine parainfluenza, canine adenovirus, and leptospirosis.
Pfizer
Weijiawu: Prevention of canine distemper, parvovirus, infectious hepatitis, canine parainfluenza, and canine adenovirus.
Wei Jiaba: Prevent canine distemper, parvovirus, infectious hepatitis, canine adenovirus, canine parainfluenza, coronavirus, and leptospirosis.
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