HHV-6B primary infection is the cause of the common childhood illness exanthem subitum.

HHV-6B 原发性感染是儿童常见疾病猝发疹的病因。

youdao

Additionally, acute primary infection may occur without symptoms.

此外，急性初发感染可以无任何症状。

youdao

Additional clinical studies are needed to delineate further the role of antiretroviral therapy in the primary infection period.

另外，还需进行进一步的临床研究明确抗逆转录病毒治疗在初发感染阶段的作用。

youdao

The primary risk factor for human infection appears to be direct or indirect exposure to infected live or dead poultry or contaminated environments.

FORBES: Bird Flu Claims More Lives In Shanghai

For other infections, particularly viruses, the primary treatment options are: vaccination to prevent infection, antiviral agents that only work against specific viruses (sometimes only specific strains of viruses) and just doing the best you can do to keep a patient healthy and hydrated while their own immune system does the heavy lifting.

FORBES: Researchers Discover a Universal Antiviral Drug