1　计划免疫网络的因素冷链装备 :冷链是疫苗效价的保证 ,也是贮存和运输的必备设施。对乙肝疫苗而言 ,冷链在各级 ,尤其是在乡、村两级的充分配备 ,是确保及时对新生儿进行乙肝疫苗接种的前题。而目前 ,由于受经费限制 ,各地的冷链装备仍不完善 ,少部分地区的冷链甚至未能覆盖 1 Plan Immune Network Factors Cold Chain Equipment: The cold chain is a guarantee of vaccine potency and is an essential facility for storage and transportation. For hepatitis B vaccine, cold chain at all levels, especially at the township and village levels fully equipped to ensure timely hepatitis B vaccination of the newborn issue. At present, due to financial constraints, the cold chain around the equipment is still not perfect, in some parts of the cold chain or even failed to cover