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13 Fig. 3. Constant fever Fig. 4. Mild fever (remitting) Intermittent (intermittent) fever : temperature rises to 39–40 °C and above followed by a rapid (in a few hours) fall below 37 °C. Fluctuations are repeated after 48–72 hours. It is typical for malaria (three-, four-day), cytomegalovirus infection, infectious mononucleosis, purulent infection (Fig.5). Recurrent fever: a sudden rise the temperature till 40 °C and more is replaced by its fall in a few days to normal, which lasts for several days, and then the temperature curve is repeated. It is typical for of recurrent typhus (Fig.6). Fig. 5. Alternating fever (intermittent)