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1 článek from Guardian Unlimited Science

Does exposure to cold and flu viruses weaken or strengthen the immune system?

And is that answer different now in our Covid world? Linda Geddes looks at the evidence and talks to the expertsAs temperatures drop and November rain falls, the seasonal onslaught of coughs, sore throats and sniffles may feel inevitable, but does constant exposure to everyday infections such as colds or influenza drain us or make us stronger?Our immune systems are often said to have memory,...