CDC) said on Wednesday that COVID-19 vaccines may not be initially recommended for children, when they become available.Children, who rarely have severe COVID-19 symptoms, have not yet been tested for any experimental coronavirus vaccine.The CDC said so far early clinical trials have only included non-pregnant adults, noting the recommended groups could change in the future as clinical trials expand to recruit more people.Pfizer Inc has said it will enrol children, who are capable of passing on the virus to high-risk groups, as young as 12 in its large, late-stage COVID-19 vaccine trial, while AstraZeneca has said a sub-group of patients in a large trial will test children between five to 12.There is no vaccine for COVID-19 yet, but a.