Cold weather causes sore throats
We're more likely to get a sore throat in winter, partly because we spend more time indoors with others which increases the risk of infection. It is, however, caused by bacteria or a virus.
You are likely to get a sore throat by kissing
You can transmit the bacteria or virus this way, but the main cause is believed to be sneezing and coughing.
Vitamin C can prevent and cure a cold
Research has actually found no conclusive evidence that this is the case.