This is because "immune systems rely on recognizing specific molecular shapes found in invading bacteria," said CNN. If these shapes were reflected, "recognition would be impaired and immune ...

Bacteria are among the smallest living things. A single bacterium consists of just one cell. Not all bacteria are harmful. There are different unicellular organisms and types of bacteria.

Bacteria are among the smallest living things. A single bacterium consists of just one cell. Not all bacteria are harmful. There are different unicellular organisms and types of bacteria.