Clara Magalasi, who lives in a rural village near Lilongwe, the capital city of Malawi, woke up to a grey morning with a dull sky that was threatening rain. For Clara, the weather did not stop her from walking 4 kilometers to Chileka Health Centre. Her daughter Grace Butawo, who just turned 22 months, was due for her fourth and final dose of the RTS,S malaria vaccine.