USMLE STEP2 Exam
Step2 (Page 23 )

Updated On: 30-Jan-2026

Select the appropriate incubation period of the Chicken pox infectious disease of childhood.

  1. 16 days
  2. 78 days
  3. 810 days
  4. 1021 days
  5. 3050 days
  6. 120180 days

Answer(s): D

Explanation:

The incubation period for diphtheria is 17 days. The incubation period for chicken pox is 1021 days, average 14. Infectious mononucleosis, caused by the Epstein-Barr virus, has an estimated incubation period of 3050 days. The incubation period following infection by the mumps virus is usually 1618 days but, like chicken pox, may vary from 14 to 25 days. Pertussis has a shorter incubation period, usually 710 days, with a variation of 421 days. The usual period from contamination with tetanus spores to clinical symptoms is generally 68 days. For rubella, the incubation period is from 14 to 21 days, but usually ranges from 16 to 18 days.



Select the appropriate incubation period of the Infectious mononucleosis infectious disease of childhood.

  1. 16 days
  2. 78 days
  3. 810 days
  4. 1021 days
  5. 3050 days
  6. 120180 days

Answer(s): E

Explanation:

The incubation period for diphtheria is 17 days. The incubation period for chicken pox is 1021 days, average 14. Infectious mononucleosis, caused by the Epstein-Barr virus, has an estimated incubation period of 3050 days. The incubation period following infection by the mumps virus is usually 1618 days but, like chicken pox, may vary from 14 to 25 days. Pertussis has a shorter incubation period, usually 710 days, with a variation of 421 days. The usual period from contamination with tetanus spores to clinical symptoms is generally 68 days. For rubella, the incubation period is from 14 to 21 days, but usually ranges from 16 to 18 days.



Select the appropriate incubation period of the Mumps infectious disease of childhood.

  1. 16 days
  2. 78 days
  3. 810 days
  4. 1021 days
  5. 3050 days
  6. 120180 days

Answer(s): D

Explanation:

The incubation period for diphtheria is 17 days. The incubation period for chicken pox is 1021 days, average 14. Infectious mononucleosis, caused by the Epstein-Barr virus, has an estimated incubation period of 3050 days. The incubation period following infection by the mumps virus is usually 1618 days but, like chicken pox, may vary from 14 to 25 days. Pertussis has a shorter incubation period, usually 710 days, with a variation of 421 days. The usual period from contamination with tetanus spores to clinical symptoms is generally 68 days. For rubella, the incubation period is from 14 to 21 days, but usually ranges from 16 to 18 days.



Select the appropriate incubation period of the Pertussis infectious disease of childhood.

  1. 16 days
  2. 78 days
  3. 810 days
  4. 1021 days
  5. 3050 days
  6. 120180 days

Answer(s): C

Explanation:

The incubation period for diphtheria is 17 days. The incubation period for chicken pox is 1021 days, average 14. Infectious mononucleosis, caused by the Epstein-Barr virus, has an estimated incubation period of 3050 days. The incubation period following infection by the mumps virus is usually 1618 days but, like chicken pox, may vary from 14 to 25 days. Pertussis has a shorter incubation period, usually 710 days, with a variation of 421 days. The usual period from contamination with tetanus spores to clinical symptoms is generally 68 days. For rubella, the incubation period is from 14 to 21 days, but usually ranges from 16 to 18 days.



Select the appropriate incubation period of the Tatanus infectious disease of childhood.

  1. 16 days
  2. 78 days
  3. 810 days
  4. 1021 days
  5. 3050 days
  6. 120180 days

Answer(s): B

Explanation:

The incubation period for diphtheria is 17 days. The incubation period for chicken pox is 1021 days, average 14. Infectious mononucleosis, caused by the Epstein-Barr virus, has an estimated incubation period of 3050 days. The incubation period following infection by the mumps virus is usually 1618 days but, like chicken pox, may vary from 14 to 25 days. Pertussis has a shorter incubation period, usually 710 days, with a variation of 421 days. The usual period from contamination with tetanus spores to clinical symptoms is generally 68 days. For rubella, the incubation period is from 14 to 21 days, but usually ranges from 16 to 18 days.



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