英语语法分析

Reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases where either penicillin or erythromycin is prescribed.

在使用新抗生素的情况下，再感染可能比使用青霉素或红霉素的情况更少见。

Since many patients stop taking those drugs within three days, reinfection is common in cases where these drugs are prescribed.

由于许多患者在三天内停止服用这些药物，因此，在开了这些药物的情况下，再感染现象很常见。

A strong immunity to reinfection develops after one year.

一年后能对再度感染产生强大免疫力。