Table 18.1
Antibody Titer
$$\begin{array} { | l | r | r | r | r | } \hline & \text { Day 1 } & { \text { Day 7 } } & \text { Day 14 } & \text { Day 21 } \\\hline \text { Patient A } & 0 & 0 & 256 & 512 \\\hline \text { Patient B } & 128 & 256 & 512 & 1024 \\\hline \text { Patient C } & 0 & 0 & 0 & 0 \\\hline \text { Patient D } & 128 & 128 & 128 & 128 \\\hline\end{array}$$
-In Table 18.1,who probably has the disease?