Neck stiffness and photophobia are often absent in infants and young children who may manifest nonspecific signs such as irritability, inconsolable crying, poor feeding, and
[orpha.net]
Symptoms may include sudden onset of fever, headache, rash, limb pain, stiff neck, nausea, vomiting, photophobia (eyes being more sensitive to light), and altered mental status
[cdph.ca.gov]
Infants and young children does not manifest neck stiffness and photophobia.
[symptoma.com]