| Seven acellular gels were prepared as described above, but allowed to set for 30 min. |
| In 1996, the NVIC realized a major goal when the FDA licensed an improved pertussis vaccine known as the acellular pertussis vaccine. |
| Microscopy revealed acellular laminated membranes with a germinal layer within the medullary cavity of the tibia and fibula. |
| Microscopic examination revealed nests and cords of clear cells separated by a fibrous and acellular mucoid stroma. |
| This isolate contains an internal acellular compartment containing filaments linking the cells. |
| Hexavalent vaccines such as diphtheria, tetanus, acellular pertussis vaccine, hepatitis B virus vaccine, IPV, and Hib are being developed. |
