Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Effect of Daily Consumption of Yogurt Containing Bifidobacterium Lactis (BB12) on Children's' Health and Child Care Absenteeism
Brief Summary: The aim of our study is to assess the effect of daily consumption of yogurt containing probiotic bacteria BB12 on the health and growth of healthy children 12-48 months of age in out of home child care.


Options:
A: Inclusion Criteria:

* An informed consent has been signed by the parents.
* The child is at least one year old and has not had his 4th birthday at the beginning of the study
* The child is healthy.
* The child attends child care center at least 5 days a week, \> 4 hours per day.

Exclusion Criteria:

* Was born preterm.
* Had a birth weight \<2,500 g.
* Has congenital anomalies.
* Has a structural abnormality of the digestive tract or previous significant gastrointestinal surgery.
* Has chronic disease or malignancy.
* Has a serious, unstable medical condition.
* Is Failure to Thrive (FTT) (\<5th percentile of ideal body weight).
* Has an allergy or atopic disease.
* Has an allergy or intolerance to milk/dairy products.
* Has an established diagnosis of lactase deficiency.
* Is predisposed to infection (i.e., compromised immune system, HIV-AIDS, active bacterial disease, under steroid treatment).
* Received antibiotic treatment or intentionally consumes probiotic products during the preceding 4 weeks. (If the subject was on antibiotics before the beginning of the study or probiotics, a washout period of 2 weeks is required.)
B: Inclusion Criteria:

* males and females
* age 18-70 years
* increased risk for common cold (at least 4 episodes within 12 months)
* commitment to adhere to former diet and physical activity
* commitment not to use any products that may influence the study outcome (e.g. immune suppressants/immune stimulants, including paramedication such as e.g. Echinacea, analgesics/anti-rheumatics, anti-phlogistics, antitussives/expectorants, influenza remedies, mouth or throat therapeutics, decongestants, antibiotics, anti-histaminergic drugs, probiotics) during the study (except for rescue medication, see 7.5)
* women of child-bearing potential have to agree to use appropriate birth control methods Written consent of the subject to participate is a prerequisite for study participation.

Exclusion Criteria:

* acute / chronic upper / lower airways disease
* chronic cough of any origin
* any allergic reaction that may influence the study outcome (e.g. acute/chronic rhinitis)
* history of nasal reconstructive surgery
* presence of nasal ulcers or nasal polyps
* severe nasal septum deviation or other condition that could cause nasal obstruction
* congenital or acquired immunodeficiency disease (e.g. HIV infection)
* Bechterew's disease
* body temperature above 37.5°C
* suspected swine flu or influenza
* vaccination with a vaccine containing an adjuvant within 3 months prior to study start and during the study
* vaccination with a vaccine not containing an adjuvant within 6 weeks prior to study start and during the study
* stomach/gastrointestinal diseases
* serious organ or systemic diseases
* sleep disorder
* psychiatric disorders
* known sensitivity to the ingredients of the investigational product
* regular intake of products that may influence the study outcome (e.g. immune suppressants/immune stimulants, including paramedication such as e.g. Echinacea, analgesics/anti-rheumatics, anti-phlogistics, antitussives/expectorants, influenza remedies, mouth or throat therapeutics, decongestants, antibiotics, anti-histaminergic drugs, probiotics) within the last 4 weeks prior to study start
* habitual usage of nasal drops/spray
* pregnancy or nursing
* alcohol / drug abuse
* simultaneous participation in another clinical trial or participation in a clinical trial within the last 30 days
* insufficient compliance
C: Inclusion Criteria:

* Healthy 1 month infants exclusively formula-fed

Exclusion Criteria:

* gastrointestinal disorders (history of chronic diarrhoea or constipation, gastroesophageal reflux)
* gastrointestinal surgery
* cow's milk protein allergy
* metabolic disorders (diabetes, lactose intolerance)
* immune deficiency
* antibiotic prescription 1-week prior to inclusion and previous use of formula containing prebiotics or probiotics
D: Inclusion Criteria:

* Able to give informed consent
* Over 60 years old without any health problems
* The levels of white blood cells within range 4x10\^3/μL\~10x10\^3/μL

Exclusion Criteria:

* Individuals who get a cold
* Diabetes
* Hypersensitivity or disease history for milk protein
* Epilepsy, neurological, or psychological disease
* Alcoholism or drug addiction
* Liver disease or severe kidney failure disease
* Inflammation-related disease
* Consumption of other test products or drugs within 1 month prior to screening
* Regular consumption of immune-related functional foods including yogurt or milk within 1 month prior to screening
* History of inflammation-related disease or taking medication to treat inflammation-related disease within 1 month prior to screening
* History of cancer within 5 years
* Any inappropriate condition

Answer: A