Much like viral pathogens, infection by certain bacterial pathogens can be prevented via vaccines.[30] Vaccines against bacterial pathogens include the anthrax vaccine and the pneumococcal vaccine. Many other bacterial pathogens lack vaccines as a preventive measure, but infection by these bacteria can often be treated or prevented with antibiotics. Common antibiotics include amoxicillin, ciprofloxacin, and doxycycline. Each antibiotic has different bacteria that it is effective against and has different mechanisms to kill that bacteria. For example, doxycycline inhibits the synthesis of new proteins in both gram-negative and gram-positive bacteria which leads to the death of the affected bacteria.[35]